小学五年级数学简便计算练习题和答案

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小学数学五年级上册简便计算68道题(含答案)

小学数学五年级上册简便计算68道题(含答案)

小学数学五年级上册简便计算68道题(含详细答案)3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 3.29+0.73-2.29+2.27 3.29×0.25×40.125×8.80.25×0.280.125×3.2×2.535×10.2 0.25×4÷0.2 5×43.5×9.9 3.5×99+3.53.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.733.5×2.7-3.5×0.7(32+5.6)÷0.8 3.5÷0.6-0.5÷0.64.9÷1.4 7÷0.25÷47÷0.1257.35÷(7.35×0.25)7.35÷(7.35÷0.25)3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.55 3.25+1.79-0.59+1.7523.4-0.8-13.4-7.2 0.32×4033.2+0.36+4.8+ 1.64 1.23+ 3.4-0.23+6.6 0.25×3612.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×47.6×0.8+0.2×7.60.85×1990.25×8.5×41.28×8.6+0.72×8.612.5×0.96×0.8 10.4-9.6×0.350.8×(4.3×1.25) 3.12+3.12×9928.6×101-28.6(4.23+6.17)×0.80.86×15.7-0.86×14.7 2.4×10214-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5(2.5-0.25)×0.4 9.16×1.5-0.5×9.163.6-3.6×0.54.5÷1.8 930÷0.6÷5 63.4÷2.5÷0.4 4.25÷2.5×9.9+0.173.9÷(1.3×5)(7.7+1.54)÷0.72.5×2.4 2.7÷450.35×1.25×2×0.8 32.4×0.9+0.1×32.415÷0.25 15÷(0.15×0.4)小学数学五年级上册简便计算练习(答案卷)一、归类练习:3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5=3.29+(0.73+2.27) =3.29-(0.73+2.27) =(7.5-7.5)+(2.5+2.5)=3.29+3 =3.29-3 =0+5=6.29 =0.29 =5(加法结合律)(减法的性质)(同级运算交换)7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)=7.325-3.325-3.29 =7.325-5.325-1.7 =7.325-5.325+1.7=4-3.29 =2-1.7 =2+1.7=0.71 =0.3 =3.7(减法交换)(减法的性质)(前面减号,脱括号变符号)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8=(3.29-2.29)+(0.73+2.27) =3.29×(0.25×4) =0.125×8×1.1=1+3 =3.29×1 =1×1.1=4 =3.29 =1.1(同级运算交换)(乘法结合律)(先拆数,乘法结合律)0.25×0.28 0.125×3.2×2.5 35×10.2=0.25×4×0.07 =(0.125×8)×(0.4×2.5) =35×(10+0.2)=1×0.07 =1×1 =35×10+35×0.2=0.07 =1 =350+7(先拆数,乘法结合律)(拆数,乘法结合律) =357(拆数,乘法分配律)0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5=(0.25÷0.25)×(4×4) =3.5×(10-0.1) =3.5×(99+1)=1×16 =3.5×10-3.5×0.1 =3.5×100=16 =35-0.35 =350(同级运算交换) =34.65 (乘法分配律)(拆数,乘法分配律)3.5×101-3.5 3.5×9.9+3.5×0.1 ★ 3.5×2.7+35×0.73=3.5×(101-1) =3.5×(9.9+0.1) =3.5×2.7+3.5×7.3=3.5×100 =3.5×10 =3.5×(2.7+7.3)=350 =35 =3.5×10(乘法分配律)(乘法分配律) =35(先利用积不变的规律转化,然后再用乘法分配律)3.5×2.7-3.5×0.7 ★ (32+5.6)÷0.8 ★ 3.5÷0.6-0.5÷0.6=3.5×(2.7-0.7) =32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6=3.5×2 =40+7 =3÷0.6=7 =47 =5(乘法分配律)(后2题类似分配律,但只适用于(a+b)÷c和(a-b)÷c,而a÷(b+c)和a÷(b-c)不能用。

小学数学五年级上册简便计算68道题(含详细答案)

小学数学五年级上册简便计算68道题(含详细答案)

小学数学五年级上册简便计算68道题(含详细答案)3.29+0.73+2.273.29-0.73-2.277.5+2.5-7.5+2.57.325-3.29-3.3257.325-(5.325+1.7)7.325-(5.325-1.7)3.29+0.73-2.29+2.273.29×0.25×40.125×8.8零点二五×0.280.125×三点二二×二点五三五×10.20.25×4÷0.25×四3.5×9.93.5×99+3.5三点五×101-3.53.5×9.9+3.5×0.13.5×2.7+35×零点七三1三点五×2.7-3.5×0.7(32+5.6)÷0.83.5÷0.6-0.5÷0.64.9÷1.47÷0.25÷47÷0.1257.35÷(7.35 × 0.25)3.07-0.38-1.628-2.45-1.5523.4-0.8-13.4-7.27.35÷(7.35÷0.25)1.29+3.7+2.71+6.33.25+1.79-0.59+1.750.32×肆佰叁拾二元3.2+0.36+4.8+1.641.23+3.4-0.23+6.60.25×3612.7-(3.7+0.84)36.54-1.76-4.540.25×零点七三×四7.6×0.8+0.2×7.61.28×8.6+0.72×8.60.8×(4.3×1.25)3.12(4.23+6.17)×零点八14-7.32-2.68零点八五×一千九百九十九点二五×八点五×四百一十二点五×零点九六×0.810.4-9.6×0.35+3.12×九千九百二十八点六×101-28.60.86×15.7-0.86×14.72×一百零二2.64+8.67+7.36+11.332.31×1.2×0.5三(2.5-0.25)×0.49.16×1.5-0.5×9.163.6-3.6 × 0.54.5÷1.8930÷0.6÷563.4÷2.5÷0.44.25÷2.5×9.9+0.173.9÷(1.3 × 5)(7.7+1.54)÷0.72.5×2.42.7÷45零点三五×一点二五×二×0.832.4×0.9+0.1×三十二点四15÷0.2515÷(0.15×0.4)四小学数学五年级上册简便计算练习(答案卷)一、分类工作:3.29+0.73+2.273.29-0.73-2.277.5+2.5-7.5+2.5=3.29+(0.73+2.27)=3.29-(0.73+2.27)=(7.5-7.5)+(2.5+2.5)=3.29+3=3.29-3=0+5=6.29=0.29=5(加法组合定律)(减法性质)(同级运算交换)7.325-3.29-3.3257.325-(5.325+1.7)7.325-(5.325-1.7)=7.325-3.325-3.29=7.325-5.325-1.7=7.325-5.325+1.7=4-3.29=2-1.7=2+1.7=0.71=0.3=3.7(减法交换)(减法的本质)(前面有减号,从括号中变成一个符号)3.29+0.73-2.29+2.273.29×0.25×40.125×8.8=(3.29-2.29)+(0.73+2.27)=3.29×(0.25×4)=0.125×8×1.1=1+3=3.29×1=1×1.1=4=3.29=1.1(同级运算交换)(乘法组合法则)(第一次分割数,乘法组合法则)0.25×0.280.125×3.2×2.535×10.2=0.25×4×0.07=(0.125×8)×(0.4×2.5)=35×(10+0.2)=1×0.07=1×1=35×10+35×0.2=0.07=1=350+7(先拆数,乘法结合律)(拆数,乘法结合律)=357(拆数,乘法分配律)零点二五×4÷0.25×四十三点五×9.93.5×99+3.5=(0.25÷0.25)×(4×4)=3.5×(10-0.1)=3.5×(99+1)=1×16=3.5×10-3.5×0.1=3.5×100=16=35-0.35=350(同级运算交换)=34.65(乘法分配律)(分裂数,乘法分布定律)3.5×101-3.53.5×9.9+3.5×0.1★3.5×2.7+35×0.73=3.5×(101-1)=3.5×(9.9+0.1)=3.5×2.7+3.5×7.3=3.5×100=3.5×10=3.5×(2.7+7.3)=350=35=3.5×10(乘法分配律)(乘法分配律)=35(首先使用乘积不变性定律进行变换,然后再用乘法分配律)五。

小学数学五年级简便计算题及答案

小学数学五年级简便计算题及答案

五年级数学简便计算题及答案3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 3.29+0.73-2.29+2.273.29×0.25×40.125×8.80.25×0.280.125×3.2×2.535×10.20.25×4÷0.25×43.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.733.5×2.7-3.5×0.7(32+5.6)÷0.8 3.5÷0.6-0.5÷0.64.9÷1.47÷0.25÷47÷0.1257.35÷(7.35×0.25)7.35÷(7.35÷0.25)3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.55 3.25+1.79-0.59+1.7523.4-0.8-13.4-7.2 0.32×4033.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×3612.7-(3.7+0.84)36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4 1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.350.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.6 (4.23+6.17)×0.8 0.86×15.7-0.86×14.7 2.4×10214-7.32-2.68 2.64+8.67+7.36+11.33答案3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5=3.29+(0.73+2.27) =3.29-(0.73+2.27) =(7.5-7.5)+(2.5+2.5)=3.29+3 =3.29-3 =0+5=6.29 =0.29 =5(加法结合律)(减法的性质)(同级运算交换)7.325-3.29-3.325 7.325-(5.325+1.7)=7.325-3.325-3.29 =7.325-5.325-1.7=4-3.29 =2-1.7=0.71 =0.3(减法交换)(减法的性质)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8=(3.29-2.29)+(0.73+2.27)=3.29×(0.25×4)=0.125×8×1.1=1+3 =3.29×1 =1×1.1=4 =3.29 =1.1(同级运算交换)(乘法结合律)(先拆数,乘法结合律)0.25×0.28 0.125×3.2×2.5 35×10.2=0.25×4×0.07 =(0.125×8)×(0.4×2.5)=35×(10+0.2)=1×0.07 =1×1 =35×10+35×0.2 =0.07 =1 =350+7(先拆数,乘法结合律)(拆数,乘法结合律) =357(拆数,乘法分配律)0.25×4÷0.25×4=(0.25÷0.25)×(4×4)=1×16=16(同级运算交换)3.5×101-3.5 3.5×9.9+3.5×0.1 ★ 3.5×2.7+35×0.73=3.5×(101-1)=3.5×(9.9+0.1)=3.5×2.7+3.5×7.3=3.5×100 =3.5×10 =3.5×(2.7+7.3)=350 =35 =3.5×10(乘法分配律)(乘法分配律) =35(先利用积不变的规律转化,然后再用乘法分配律)3.5×2.7-3.5×0.7 ★ (32+5.6)÷0.8 ★ 3.5÷0.6-0.5÷0.6=3.5×(2.7-0.7)=32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6=3.5×2 =40+7 =3÷0.6=7 =47 =5(乘法分配律)(后 2 题类似分配律,但只适用于(a+b)÷c和(a-b)÷c,而a÷(b+c)和a÷(b-c)不能用。

小学数学五年级上册简便计算68道题(含详细规范标准答案)

小学数学五年级上册简便计算68道题(含详细规范标准答案)

小学数学五年级上册简便计算68道题(含详细规范标准答案)一、加减法简便计算1. 123 + 456 = 5792. 789 321 = 4683. 678 + 123 456 = 3454. 456 + 789 123 = 11225. 987 + 654 321 = 13206. 789 + 456 123 = 11227. 654 + 321 987 = 3128. 321 + 987 654 = 6549. 123 + 456 + 789 = 136810. 456 + 789 + 123 = 1368二、乘除法简便计算11. 7 × 8 = 5612. 9 ÷ 3 = 313. 12 × 13 = 15614. 15 ÷ 5 = 315. 18 × 19 = 34216. 21 ÷ 7 = 317. 24 × 25 = 60018. 27 ÷ 9 = 319. 30 × 31 = 93020. 33 ÷ 11 = 3三、混合运算简便计算21. 12 + 7 × 8 = 6822. 9 ÷ 3 + 6 = 723. 12 × 13 45 = 14124. 15 ÷ 5 + 8 = 725. 18 × 19 + 21 = 35726. 21 ÷ 7 4 = 127. 24 × 25 12 = 58828. 27 ÷ 9 + 3 = 629. 30 × 31 15 = 91530. 33 ÷ 11 2 = 1四、分数简便计算31. 1/2 + 1/3 = 5/632. 2/3 ÷ 1/4 = 8/333. 3/4 + 1/2 = 5/434. 4/5 ÷ 1/2 = 8/535. 5/6 + 1/3 = 7/636. 6/7 ÷ 1/4 = 24/737. 7/8 + 1/2 = 11/838. 8/9 ÷ 1/3 = 839. 9/10 + 1/5 = 13/1040. 10/11 ÷ 1/2 = 20/11五、小数简便计算41. 0.5 + 0.3 = 0.842. 0.6 ÷ 0.2 = 343. 0.7 × 0.8 = 0.5644. 0.4 ÷ 0.4 = 145. 0.9 + 0.1 = 146. 0.8 ÷ 0.2 = 447. 0.7 × 0.9 = 0.6348. 0.6 ÷ 0.3 = 249. 0.5 + 0.2 = 0.750. 0.4 ÷ 0.2 = 2六、百分数简便计算51. 20% + 30% = 50%52. 40% ÷ 20% = 253. 50% × 80% = 40%54. 25% + 75% = 100%55. 60% ÷ 30% = 256. 70% × 50% = 35%57. 80% + 20% = 100%58. 90% ÷ 10% = 959. 55% × 45% = 24.75%60. 65% + 35% = 100%七、方程简便计算61. 2x + 3 = 7,解得 x = 262. 3x 4 = 5,解得 x = 363. 4x + 5 = 9,解得 x = 164. 5x 6 = 4,解得 x = 265. 6x + 7 = 13,解得 x = 166. 7x 8 = 9,解得 x = 367. 8x + 9 = 17,解得 x = 168. 9x 10 = 11,解得 x = 3八、应用题简便计算69. 小华有10个苹果,小明有15个苹果,他们一共有多少个苹果?解:10 + 15 = 25个苹果。

五年级下册数学简便计算专项练习100题及答案

五年级下册数学简便计算专项练习100题及答案

五年级下册数学简便计算专项练习100题及答案一、加法运算1. 58 + 47 = ?2. 234 + 315 = ?3. 167 + 189 = ?4. 891 + 432 = ?5. 725 + 634 = ?二、减法运算6. 367 - 183 = ?7. 572 - 324 = ?8. 897 - 271 = ?9. 512 - 314 = ?10. 879 - 167 = ?三、乘法运算11. 32 × 5 = ?12. 46 × 3 = ?13. 17 × 8 = ?14. 25 × 6 = ?15. 59 × 4 = ?四、除法运算16. 72 ÷ 9 = ?17. 126 ÷ 6 = ?18. 84 ÷ 7 = ?19. 49 ÷ 7 = ?20. 168 ÷ 8 = ?五、混合运算21. 26 + 17 × 3 = ?22. (45 + 29) × 2 = ?23. 38 - 15 + 22 = ?24. (63 - 27) × 4 = ?25. 56 + 43 - 28 = ?六、单位换算26. 5.6 kg = ______ g27. 760 ml = ______ l28. 3 m = ______ dm29. 4500 g = ______ kg30. 4.2 km = ______ m七、割圆问题31. 将一个半径为7 cm的圆分割成四等份,每一份的圆心角是多少度?32. 将一个半径为12 cm的圆分割成六等份,每一份的圆心角是多少度?八、周长与面积33. 长方形的长为13 cm,宽为5 cm,它的周长是多少?34. 矩形的长为18 cm,宽为7 cm,它的面积是多少平方厘米?35. 正方形的边长为9 cm,它的周长和面积分别是多少?九、图形的对称性36. 写出下图的对称轴:* * * * ** * * ** * ** **37. 写出下图的对称轴:** ** * ** * * ** * * * *十、数的关系38. 142与140的关系是:__?39. 872与708的关系是:__?40. 289与920的关系是:__?十一、分数运算41. 3/4 + 1/2 = ?42. 5/8 - 2/5 = ?43. 2/3 × 4/5 = ?44. 7/9 ÷ 3/4 = ?45. 2 1/2 + 4 3/4 = ?十二、比较大小46. 7.4 __ 7.4047. 0.18 __ 0.18948. 6/9 __ 5/649. 82% __ 0.8250. 8 7/10 __ 8 9/10十三、数的整除性51. 13是__的约数。

五年级下册数学简便计算专项练习题及答案

五年级下册数学简便计算专项练习题及答案

五年级下册数学简便计算专项练习题及答案一、填空题(每题2分,共计20分)1. 3479 - 2346 = _______2. 5069 + 3096 = _______3. 4538 - 856 = _______4. 1892 + 2748 = _______5. 7643 - 2839 = _______6. 5296 + 8765 = _______7. 3472 - 569 = _______8. 6098 + 8745 = _______9. 4167 - 587 = _______10. 7562 + 4593 = _______二、计算题(每题5分,共计30分)1. 将5269分别加上3000和4000,分别用估算法和实际计算法计算,然后比较两种结果的误差。

2. 将6789分别减去3000和4000,分别用估算法和实际计算法计算,然后比较两种结果的误差。

3. 通过数轴解决问题:小明离学校有627米,小王距离学校直线距离比小明多273米,问小王离学校多远?4. 从1开始,每次加2,加到1011时停下来,求和。

5. 小明手上有1389元,他买了一本价值89元的书,还给了售货员1000元,问他还剩多少钱?6. 小华距离学校有9845米,小明的家距离学校比小华远3145米,问小明家到学校有多远?7. 甲、乙两个数相加等于1021,乙数是甲数的2倍加上111,求甲乙两个数各是多少?8. 某商店的原价是800元,现在打8折,求现价。

9. 有一台机器现价1800元,原价是原价是打9折,求原价。

10. 一个数字是17的3倍减去24,结果是多少?三、解答题(每题10分,共计50分)1. 一辆汽车行驶了876千米,一天开了8小时,平均速度是多少千米/小时?2. 一件商品的原价是288元,现在打六折出售,求现价。

3. 小明搬砖,第一天搬了105块砖,从第二天起每天多搬2块砖,共搬了10天,求他一共搬了多少块砖?4. 两小明和小华一起搬砖,他们每人每天搬了35块砖,一共搬了5天,请问他们一共搬了多少块砖?5. 某店商品原价是768元,现在打8折出售,甲乙两人分别买了1件,乙比甲多支付了80元,求甲乙两人支付的现价。

小学数学五年级上册简便计算68道题含答案

小学数学五年级上册简便计算68道题含答案

小学数学五年级上册简便计算68道题〔含详细答案〕3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.80.25×0.280.125×3.2×2.535×10.2 0.25×4÷0.25×43.5×9.9 3.5×99+3.53.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.733.5×2.7-3.5×0.7(32+5.6)÷0.8 3.5÷0.6-0.5÷0.64.9÷1.4 7÷0.25÷47÷0.1257.35÷(7.35×0.25)7.35÷(7.35÷0.25)3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.553.25+1.79-0.59+1.7523.4-0.8-13.4-7.2 0.32×4033.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×3612.7-〔3.7+0.84〕36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.60.85×1990.25×8.5×41.28×8.6+0.72×8.612.5×0.96×0.8 10.4-9.6×0.350.8×〔4.3×1.25〕 3.12+3.12×9928.6×101-28.6〔4.23+6.17〕×0.80.86×15.7-0.86×14.7 2.4×10214-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5 〔2.5-0.25〕×0.4 9.16×1.5-0.5×9.163.6-3.6×0.54.5÷1.8 930÷0.6÷563.4÷2.5÷0.4 4.25÷2.5×9.9+0.173.9÷〔1.3×5〕〔7.7+1.54〕÷0.72.5×2.4 2.7÷450.35×1.25×2×0.8 32.4×0.9+0.1×32.415÷0.25 15÷〔0.15×0.4〕小学数学五年级上册简便计算练习〔答案卷〕一、归类练习:3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5=3.29+〔0.73+2.27〕 =3.29-〔0.73+2.27〕=〔7.5-7.5〕+〔2.5+2.5〕=3.29+3 =3.29-3 =0+5=6.29 =0.29 =5〔加法结合律〕〔减法的性质〕〔同级运算交换〕7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)=7.325-3.325-3.29 =7.325-5.325-1.7 =7.325-5.325+1.7=4-3.29 =2-1.7 =2+1.7=0.71 =0.3 =3.7〔减法交换〕〔减法的性质〕〔前面减号,脱括号变符号〕3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8=〔3.29-2.29〕+〔0.73+2.27〕=3.29×〔0.25×4〕 =0.125×8×1.1=1+3 =3.29×1 =1×1.1=4 =3.29 =1.1〔同级运算交换〕〔乘法结合律〕〔先拆数,乘法结合律〕0.25×0.28 0.125×3.2×2.5 35×10.2=0.25×4×0.07 =〔0.125×8〕×〔0.4×2.5〕 =35×〔10+0.2〕=1×0.07 =1×1 =35×10+35×0.2=0.07 =1 =350+7〔先拆数,乘法结合律〕〔拆数,乘法结合律〕=357〔拆数,乘法分配律〕0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5=〔0.25÷0.25〕×〔4×4〕 =3.5×〔10-0.1〕 =3.5×〔99+1〕=1×16 =3.5×10-3.5×0.1 =3.5×100=16 =35-0.35 =350〔同级运算交换〕=34.65 〔乘法分配律〕〔拆数,乘法分配律〕3.5×101-3.5 3.5×9.9+3.5×0.1 ★3.5×2.7+35×0.73=3.5×〔101-1〕=3.5×〔9.9+0.1〕 =3.5×2.7+3.5×7.3=3.5×100 =3.5×10 =3.5×〔2.7+7.3〕=350 =35 =3.5×10〔乘法分配律〕〔乘法分配律〕=35〔先利用积不变的规律转化,然后再用乘法分配律〕3.5×2.7-3.5×0.7 ★(32+5.6)÷0.8 ★3.5÷0.6-0.5÷0.6=3.5×〔2.7-0.7〕=32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6=3.5×2 =40+7 =3÷0.6=7 =47 =5〔乘法分配律〕〔后2题类似分配律,但只适用于〔a+b〕÷c和(a-b)÷c,而a÷(b+c)和a÷(b-c)不能用。

新人教版小学数学五年级简便计算题及答案

新人教版小学数学五年级简便计算题及答案

五年级数学简便计算题及答案3.29+0.73+2.27 3.29-0.73-2.277.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 3.29+0.73-2.29+2.273.29×0.25×40.125×8.8 0.25×0.28 0.125×3.2×2.535×10.2 0.25×4÷0.25×4 3.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.733.5×2.7-3.5×0.7(32+5.6)÷0.8 3.5÷0.6-0.5÷0.64.9÷1.47÷0.25÷47÷0.1257.35÷(7.35×0.25)7.35÷(7.35÷0.25)3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.55 3.25+1.79-0.59+1.7523.4-0.8-13.4-7.20.32×4033.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×3612.7-(3.7+0.84)36.54-1.76-4.540.25×0.73×4 7.6×0.8+0.2×7.60.85×1990.25×8.5×4-9.6×0.351.28×8.6+0.72×8.6 12.5×0.96×0.8 10.40.8×(4.3×1.25) 3.12+3.12×9928.6×101-28.6(4.23+6.17)×0.80.86×15.7-0.86×14.7 2.4×102 14-7.32-2.68 2.64+8.67+7.36+11.33答案3.29+0.73+2.27 3.29-0.73-2.277.5+2.5-7.5+2.5=3.29+(0.73+2.27) =3.29-(0.73+2.27) =(7.5-7.5)+(2.5+2.5)=3.29+3 =3.29-3 =0+5=6.29 =0.29 =5(加法结合律)(减法的性质)(同级运算交换)7.325-3.29-3.3257.325-(5.325+1.7)=7.325-3.325-3.29 =7.325-5.325-1.7=4-3.29 =2-1.7=0.71 =0.3(减法交换)(减法的性质)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8=(3.29-2.29)+(0.73+2.27) =3.29×(0.25×4)=0.125×8×1.1=1+3 =3.29×1=1×1.1=4 =3.29 =1.1(同级运算交换)(乘法结合律)(先拆数,乘法结合律)0.25×0.28 0.125×3.2×2.5 35×10.2=0.25×4×0.07=(0.125×8)×(0.4×2.5)=35×(10+0.2)=1×0.07 =1×1 =35×10+35×0.2=0.07 =1 =350+7(先拆数,乘法结合律)(拆数,乘法结合律) =357(拆数,乘法分配律)0.25×4÷0.25×4=(0.25÷0.25)×(4×4)=1×16=16(同级运算交换)3.5×101-3.5 3.5×9.9+3.5×0.1★ 3.5×2.7+35×0.73=3.5×(101-1) =3.5×(9.9+0.1) =3.5×2.7+3.5×7.3=3.5×100 =3.5×10 =3.5×(2.7+7.3)=350 =35 =3.5×10(乘法分配律)(乘法分配律) =35(先利用积不变的规律转化,然后再用乘法分配律)3.5×2.7-3.5×0.7★ (32+5.6)÷0.8★ 3.5÷0.6-0.5÷0.6=3.5×(2.7-0.7) =32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6=3.5×2 =40+7 =3÷0.6=7 =47 =5(乘法分配律)(后2题类似分配律,但只适用于(a+b)÷c和(a-b)÷c,而a÷(b+c)和a÷(b-c)不能用。

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