简便计算题
75道简便计算题及答案
75道简便计算题及答案(1)2.5*32*0.125=(2.5*4)*(8*0.125)=10*1=10(2)3.5-7+6.5=3.5+6.5-7=3(3)1.2×2.5+0.8×2.5=2.5(1.2+0.8)=25(4)8.9×1.25-0.9×1.25=1.25(8.9-0.9)=10(5)12.5×7.4×0.8=12.5×0.8×7.4=74(6)6.5×9.5+6.5×0.5=6.5×(9.5+0.5)=6.5×10=65(7)0.35×1.6+0.35×3.4=0.35*(1.6+3.4)=0.35*5=1.75(8)6.72-3.28-1.72=6.75-(3.28+1.72)=6.75-5=1.75(9)0.45+6.37+4.55=0.45+4.55+6.37=5+6.37=11.37(10)28×12.5-12.5×20=(28-20)*12.5=8*12.5=100(11)23.65-(3.07+3.65)=23.65-3.65-3.07=20-3.07=16.93(12)(4+0.4×0.25)8×7×1.25 =(4+1)*7*10=5*7*10=350(13)1.65×99+1.65=1.65*(99+1)=1.65*100=165(14)27.85-(7.85+3.4)=27.85-7.85+3.4=20+3.4=23.4(15)48×1.25+50×1.25×0.2×87.8×9.9+0.78=7.8*(9.9+0.1)=7.8*10=78(16)4.8×46+4.8×54=(46+54)*4.8=100*4.8=480(17)673-327-173=673-(327+173)=673-500=173(18)4.44*2.5=1.11*(4*2.5)=1.11*10=11.1(19)3.5÷1.4=(3.5÷0.7)÷(1.4÷0.7)=5÷2=2.5(20)1+2+3+4+5......+99+100=(1+99)+(2+98)+(3+97)+......+(49+51)+50=(100÷2-1)*100+50=4900+50=4950(21)0.88+5.6+0.12 1.78+3.5+0.22 5.6+2.08+14.4=0.88+0.12+5.6 =1.78+0.22+3.5 =5.6+14.4+2.08=1+5.6 =2+3.5 =20+2.08=6.6 =5.5 =22.08(22)2.3+(0.56+4.7) 28.6+0.54+0.46+1.4 5.82+4.56+5.44=(2.3+4.7)+0.56 =(28.6+1.4)+(0.54+0.46) =5.82+(4.56+5.44) =7+0.56 =30+1 =5.82+10=7.56 =31 =15.82(23)25×0.37×0.4 7.5×0.39×4 6.5×1.1×4 1.25×3.9×0.8=25×0.4×0.37 =7.5×4×0.39 =6.5×4×1.1 =1.25×0.8×3.9=10×0.37 =30×0.39 =26×1.1 =1×3.9=3.7 =11.7 =28.6 =3.9,(24)1.9×7.5×8 6.2×0.8×2.5 4.3×1.5×6 4.1×3.5×2=1.9×(7.5×8) =6.2×(0.8×2.5) =4.3×(1.5×6) =4.1×(3.5×2)=1.9×60 =6.2×2 =4.3×9 =4.1×7=114 =12.4 =38.7 =28.7(25)13.6×4.6+4.6×6.4 0.72×23+77×0.72 2.6×32+32×2.4=(13.6+6.4)×4.6 =(23+77)×0.72 =(2.6+2.4) ×32=20×6.4 =100×0.72 =5×32=128 =72 =160(26)12×5.9-5.9×2 4.6×2.5-2.5×0.6 101×9.7-9.7=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7=10×5.9 =4×2.5 =100×9.7=59 =10 =970(27)1.8-0.45-0.55 54.4-4.6-5.4 35.6-0.13-0.47=1.8-(0.45+0.55) =54.4-(4.6+5.4) =35.6-(0.13+0.47)=1.8-1 =54.4-10 =35.6-0.6=0.8 =44.4 =35(28)4.5÷4÷7.5 14.8÷1.25÷8 18.5÷4÷1.25 5.4÷4÷0.45=4.5÷(4×7.5) =14.8÷(1.25×8) =18.5÷(4×1.25) =5.4÷(4×0.45)=4.5÷30 =14.8÷10 =18.5÷5 =5.4÷0.18=0.15 =1.48 =3.7 =30(30)2.54+2.46+0.44+0.54 10.7×0.4-6.7×0.4 0.5×3.2×1.25=(2.54+2.46)+(0.44+0.54) =(10.7-6.7)×0.4 =(0.5×4)×(0.8×1.25) =5+1 =4×0.4 =2×1=6 =1.6 =2(31)89.7+5.8-9.7+4.2 99×0.38+0.38 360÷(18×0.4)=(89.7-9.7)+(5.8+4.2) =(99+1) ×0.38 =360÷18÷0.4=80+10 =100×0.38 =20÷0. 4=90 =38 =50(32)4.8×12.5 2.5×1.6×12.5 3.2×102=0.6×(8×12.5) =(2.5×0.2)×(8×12.5) =3.2×(100+2)=0.6×100 =0.5×100 =3.2×100+3.2×2=60 =50 =320+6.4=326.4(33)3.5-7+6.5=3.5+6.5-7=3(34)1.2×2.5+0.8×2.5 =2.5(1.2+0.8)=25(35)8.9×1.25-0.9×1.25 =1.25(8.9-0.9)=10(36)12.5×7.4×0.8=12.5×0.8×7.4=74(37)6.5×9.5+6.5×0.5 =6.5×(9.5+0.5)=6.5×10=65(38)0.35×1.6+0.35×3.4 =0.35*(1.6+3.4)=0.35*5=1.75(39)6.72-3.28-1.72=6.75-(3.28+1.72)=6.75-5=1.75(40)0.45+6.37+4.55=0.45+4.55+6.37=5+6.37(41)28×12.5-12.5×20=(28-20)*12.5=8*12.5=100(42)23.65-(3.07+3.65)=23.65-3.65-3.07=20-3.07=16.93(43)(4+0.4×0.25)8×7×1.25=(4+1)*7*10=5*7*10=350(44)1.65×99+1.65=1.65*(99+1)=1.65*100=165(45)27.85-(7.85+3.4)=27.85-7.85+3.4=20+3.4=23.4(46)48×1.25+50×1.25×0.2×8 7.8×9.9+0.78=7.8*(9.9+0.1)=78(47)4.8×46+4.8×54=(46+54)*4.8=100*4.8=480(48)673-327-173=673-(327+173)=673-500=173(49)4.44*2.5=1.11*(4*2.5)=1.11*10=11.1(50)3.5÷1.4=(3.5÷0.7)÷(1.4÷0.7)=5÷2=2.5(51)1+2+3+4+5......+99+100=(1+99)+(2+98)+(3+97)+......+(49+51)+50 =(100÷2-1)*100+50=4900+50=4950(52)0.88+5.6+0.12=0.88+0.12+5.6=1+5.6=6.6 1.78+3.5+0.22=1.78+0.22+3.5=2+3.5=5.55.6+2.08+14.4 =5.6+14.4+2.08=20+2.08=22.08(53)2.3+(0.56+4.7) =(2.3+4.7)+0.56 =7+0.56 =7.56 28.6+0.54+0.46+1.4 =(28.6+1.4)+(0.54+0.46) =30+1 =31 5.82+4.56+5.44 =5.82+(4.56+5.44) =5.82+10=15.82(54)25×0.37×0.4=25×0.4×0.37=10×0.37=3.77.5×0.39×4 =7.5×4×0.39 =30×0.39 =11.76.5×1.1×4 =6.5×4×1.1 =26×1.1 =2.861.25×3.9×0.8=1.25×0.8×3.9=1×3.9 =3.9(55)1.9×7.5×8=1.9×(7.5×8) =1.9×60=1146.2×0.8×2.5=6.2×(0.8×2.5) =6.2×2 =12.44.3×1.5×6=4.3×(1.5×6) =4.3×9 =38.74.1×3.5×2 =4.1×(3.5×2)=4.1×7=28.7(56)13.6×4.6+4.6×6.4=(13.6+6.4)×4.6=20×4.6 =920.72×23+77×0.72 =(23+77)×0.72=100×0.72 =722.6×32+32×2.4 =(2.6+2.4) ×32 =5×32 =160(57)12×5.9-5.9×2=(12-2) ×5.9 =10×5.9=594.6×2.5-2.5×0.6 =(4.6-0.6)×2.5=4×2.5 =10101×9.7-9.7 =(101-1)×9.7=100×9.7=970(58)1.8-0.45-0.55=1.8-(0.45+0.55) =1.8-1 =0.854.4-4.6-5.4=54.4-(4.6+5.4) =54.4-10=44.435.6-0.13-0.47=35.6-(0.13+0.47)=35.6-0.6=35(59)4.5÷4÷7.5=4.5÷(4×7.5)=4.5÷30=0.1514.8÷1.25÷8=14.8÷(1.25×8)=14.8÷10 =1.4818.5÷4÷1.25=18.5÷(4×1.25)=18.5÷5 =3.75 .4÷4÷0.45 =5.4÷(4×0.45) =5.4÷0.18=30(60)2.54+2.46+0.44+0.54 =(2.54+2.46)+(0.44+0.54)=5+1 =6 10.7×0.4-6.7×0.4=(10.7-6.7)×0.4=4×0.4 =1.60.5×3.2×1.25 =(0.5×4)×(0.8×1.25) =2×1 =2(61)0.2008+2.008+20.08+200.8+2008=0.2008×(1+10+100+1000+10000)=0.2008×11110=2230.888(62)1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)÷……÷(2007÷2008)=1×3/2×4/3×5/4×6/5×……×2008/2007=2008(63)1+1/3+1/6+1/10+……+1/2009×1004=2×(1/2+1/6+1/12+1/20+……+1/2008×2009)=2×(1-1/2+1/2-1/3+1/3-1/4+……+1/2008-1/2009)=2×(1-1/2009)=2×2008/2009=4016/2009(64)2006个2006乘2007个2007再乘2008个2008的积的个位数是?2006个2006的个位数字是62007个2007的个位数字是32008个2008的个位数字是66×3×6=1082006个2006乘2007个2007再乘2008个2008的积的个位数字是8(65)325.24+425.24+625.24+925.24+525.24=(300+400+600+900+500)+25.24×5=2700+126.2=2826.2(66)1/1×4+1/4×7+1/7×10+1/10×13+……+1/2005×2008=(1-1/4+1/4-1/7+1/7-1/10+1/10-1/13+……+1/2005-1/2008)÷3=(1-1/2008)÷3=2007/2008÷3=669/2008(67)1x2+2x3+3x4+4x5+...+2002x2003=1/3*1*2*3+1/3[2*3*4-1*2*3]+1/3[3*4*5-2*3*4]+....+1/3[2002*2003*2004-2001*2002*2003]=1/3*2002*2003*2004=2678684008(68)1/1*3+1/2*4+1/3*5+1/4*6+1/5*7......1/98*100+1/99*101=(1-1/3+1/2-1/4+1/3-1/5+1/4-1/6+1/5-1/7+……+1/98-1/100+1/99-1/101)÷2=(1+1/2-1/100-1/101)÷2=15049/10100÷2=15049/20200(69)6分之1+12分之1+24分之1+48分之1+96分之1+192分之1=1/6×(1+1/2+1/4+1/8+1/16+1/32)=1/6×(1-1/32)=1/6-1/192=31/192(70)因数5的个数决定末尾0的个数2008÷5=401个(取整)2008÷25=80个(取整)2008÷125=16个(取整)2008÷625=3(取整)401+80+16+3=500个1*2*3*4*5*6*……*2008末尾有500个0(71)一艘宇宙飞船5秒航行60千米,13秒可以航行多少千米?【解答】解:60÷5×13=12×13=156(千米)答:13秒可航行156千米.(72)2吨=多少千克?【解答】2000kg(73)一个数最高位是百万位它是几位数?【解答】7位数(74)3600平方厘米=多少平方米【解答】3600平方厘米=0.36平方米(75)最大的三位数和最大的两位数的差为()。
简便运算练习题及答案
简便运算练习题及答案简便运算练习题及答案试题用于考试的题目,要求按照标准回答它是命题者按照一定的考核目的编写出来的。
下面是小编为大家收集的简便运算练习题及答案,欢迎大家分享。
用简便方法计算(1)4.35+8.6+15.65+1.4(2)19.32-5.56-3.44(3)37.6-(7.6+3.25)(4)5.49+2.68-3.49(5)6.27+3.83+1.73(6)8.4+3.5-8.4+3.5解:(1)原式=4.35+15.65+(8.6+1.4)=30(2)原式=19.32-(5.56+3.44)=10.32(3)原式=37.6-7.6-3.25=26.75(4)原式=5.49-3.49+2.68=4.68(5)原式=6.27+1.73+3.83=11.83(6)原式=8.4-8.4+3.5+3.5=7连除的简便运算说课稿一、说设计理念“数学教学活动必须建立在学生的认知发展水平和已有的知识经验基础之上,教师应激发学生学习的积极性,向学生提供充分从事数学活动的机会,帮助学生在自主探索和解决问题的过程中真正理解和掌握基本的数学知识和技能,思想和方法。
学生是数学学习的主人,教师是数学活动的组织者、引导者和合作者。
”这是义务教育数学《课程标准》对数学活动提出的'基本理念之一。
因此,我们要改变传统的教师始终“讲”,学生被动“听”的局面,把学习的主动权交给学生,充分相信学生,调动他们学习的积极性。
我在课堂教学中引用了“引导探究学习,促进主动发展”的教学思想,在本堂课中构建了探索性学习的模式。
二、说设计思路1、说教材数学不仅是人们生活和劳动必不可少的工具,通过学习数学还能提高人的推理能力和抽象能力。
连除的简便计算是义务教育课程标准实验教科书数学四年级下册第三单元的内容。
它是学生理解和掌握了加法和乘法的五条运算定律及减法的性质的基础上,进一步学习有关整数四则运算的一些简便运算。
教材主要着眼于通过不同解法的比较,使学生认识一个数连续除以两个数可以用这个数除以两个数的积。
用简便方法运算计算题120题大全
用简便方法运算计算题120题大全题目1:24+56=?解答:24+56=80题目2:365-187=?解答:365-187=178题目3:15×8=?解答:15×8=120题目4:420÷7=?解答:420÷7=60题目5:72+89=?解答:72+89=161题目6:562-298=?解答:562-298=264题目7:16×9=?解答:16×9=144题目8:540÷6=?解答:540÷6=90题目9:34+45=?解答:34+45=79题目10:751-213=?解答:751-213=538题目11:18×7=?解答:18×7=126题目12:792÷4=?解答:792÷4=198题目13:67+32=?解答:67+32=99题目14:632-240=?解答:632-240=392题目15:24×6=?解答:24×6=144题目16:660÷6=?解答:660÷6=110题目17:76+98=?解答:76+98=174题目18:845-139=?解答:845-139=706题目19:19×8=?解答:19×8=152题目20:960÷4=?解答:960÷4=240题目21:87+56=?解答:87+56=143题目22:542-328=?解答:542-328=214题目23:26×4=?解答:26×4=104题目24:720÷3=?解答:720÷3=240题目25:65+98=?解答:65+98=163题目26:235-128=?解答:235-128=107题目27:15×6=?解答:15×6=90题目28:420÷5=?解答:420÷5=84题目29:46+57=?解答:46+57=103题目30:568-321=?解答:568-321=247题目31:17×9=?解答:17×9=153题目32:768÷4=?解答:768÷4=192题目33:32+45=?解答:32+45=77题目34:632-240=?解答:632-240=392题目35:26×8=?解答:26×8=208题目36:420÷6=?解答:420÷6=70题目37:58+79=?解答:58+79=137题目38:765-390=?解答:765-390=375题目39:19×7=?解答:19×7=133题目40:720÷4=?解答:720÷4=180题目41:89+48=?解答:89+48=137题目42:635-298=?解答:635-298=337题目43:24×9=?解答:24×9=216题目44:560÷7=?解答:560÷7=80题目45:63+87=?解答:63+87=150题目46:742-431=?解答:742-431=311题目47:15×5=?解答:15×5=75题目48:840÷6=?解答:840÷6=140题目49:35+49=?解答:35+49=84题目50:721-193=?解答:721-193=528题目51:16×8=?解答:16×8=128题目52:864÷4=?解答:864÷4=216题目53:38+65=?解答:38+65=103题目54:632-240=?解答:632-240=392题目55:27×6=?解答:27×6=162题目56:720÷5=?解答:720÷5=144题目57:56+85=?解答:56+85=141题目58:839-321=?解答:839-321=518题目59:25×8=?解答:25×8=200解答:760÷4=190题目61:78+69=?解答:78+69=147题目62:652-311=?解答:652-311=341题目63:20×7=?解答:20×7=140题目64:840÷7=?解答:840÷7=120题目65:45+82=?解答:45+82=127题目66:836-327=?解答:836-327=509题目67:28×5=?解答:28×5=140题目68:720÷4=?题目69:65+47=?解答:65+47=112题目70:719-391=?解答:719-391=328题目71:26×7=?解答:26×7=182题目72:744÷4=?解答:744÷4=186题目73:32+36=?解答:32+36=68题目74:632-240=?解答:632-240=392题目75:24×7=?解答:24×7=168题目76:840÷5=?解答:840÷5=168题目77:52+67=?解答:52+67=119题目78:759-346=?解答:759-346=413题目79:18×6=?解答:18×6=108题目80:720÷5=?解答:720÷5=144题目81:35+57=?解答:35+57=92题目82:817-286=?解答:817-286=531题目83:26×5=?解答:26×5=130题目84:640÷8=?解答:640÷8=80题目85:79+47=?解答:79+47=126题目86:538-352=?解答:538-352=186题目87:29×7=?解答:29×7=203题目88:840÷6=?解答:840÷6=140题目89:41+58=?解答:41+58=99题目90:622-290=?解答:622-290=332题目91:18×9=?解答:18×9=162题目92:801÷3=?解答:801÷3=267题目93:39+25=?解答:39+25=64题目94:632-240=?解答:632-240=392题目95:38×5=?解答:38×5=190题目96:760÷4=?解答:760÷4=190题目97:59+73=?解答:59+73=132题目98:753-339=?解答:753-339=414题目99:25×6=?解答:25×6=150题目100:840÷6=?解答:840÷6=140题目101:52+67=?解答:52+67=119题目102:752-263=?解答:752-263=489题目103:17×5=?解答:17×5=85题目104:840÷7=?解答:840÷7=120题目105:37+49=?解答:37+49=86题目106:630-298=?解答:630-298=332题目107:22×9=?解答:22×9=198题目108:720÷4=?解答:720÷4=180题目109:63+47=?解答:63+47=110题目110:763-429=?解答:763-429=334题目111:19×8=?解答:19×8=152题目112:840÷5=?解答:840÷5=168题目113:47+76=?解答:47+76=123题目114:690-382=?解答:690-382=308题目115:24×9=?解答:24×9=216题目116:720÷3=?解答:720÷3=240题目117:63+87=?解答:63+87=150题目118:742-431=?解答:742-431=311题目119:15×5=?解答:15×5=75题目120:840÷7=?解答:840÷7=120此为通过简便方法运算计算题120题大全,每题都有对应的解答。