四年级口算全套

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四年级口算全套

四年级口算全套计算训练一一、口算300÷5=60，720÷9=80，16×6=96，70÷5=14，25×4=100，15×6=90，630÷9=70，84÷42=2，600-50=550，500×3=1500，0×930=0，125-25×2=75，50×0×8=0，75+25÷5=80，32÷47×12=8二、笔算54×63=3402，4+0.6=4.6三、估算238÷6≈40，89×30≈2700，32×48≈1500，43×22≈950，52×19≈1000四、脱式计算439+46×7=777，248÷4×18=1116，67×(96÷6)=1122，25×17-120=255，(450-175)÷5=55，268+29×65=1913，15-345÷3=-80，574÷(125>118)=5，948-13×5=883五、在括号内填上“＜”、“＞”或“＝”246÷3700÷5专业知识整理分享25×38=950，36×19=684，774÷8=96.75，7.3-2.9=4.4，10-0.7=9.3，8.2-5=3.2，876÷3≈292，417÷6≈70，753÷5≈150，17×36÷3=2040.23.47，7.101.21.36，1.08>0.99，7.01<7.10计算训练二一、口算9.7+1.3=11，99+11=110，280÷4=70，163+74=237，111+109=220，770÷7=110，40+135=175，82×20=1640，90×11=990，40÷5×5=40，11+30÷6=16二、做一做27×27=729三、用竖式笔算下面各题309×17=5253，800×11=8800四、用脱式计算下面各题19×5+27=118，136-12×10=16，18×27÷6=81，32×103=3296，123×23=2829，516×20=，5.4-4.5=0.9，630÷9=70，540÷6=90，350÷7=50，80×50=4000，42×6=252，507-254=253，17×50=850，9.6-6.9=2.7，27+36-11=52，17+8×6=65，560÷8=70，70-25=45，47×5=235，110-30=80，205÷5=41，707-201=506，100×10=1000，490÷7=70，64÷8×5=40，90-28+7=69，60×5÷6=50，40×60=2400，180×7=1260，81÷9=9，500÷10=50，22×30=66019×30=570525-349=176270÷3=9021÷3×7=49/356÷7×6=48xxxxxxx=907万填一填，在圆圈里填上“”或“=”符号>9979<199×12<35×18口算。

四年级数学口算题精选(3000题打印版)

小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________小学数学计算练习 2024-11-02姓名：___________ 座号：__________ 情况：___________。

四年级数学口算题集(3000题)

【上海市】四年级口算全套

时间20分钟一、口算。

300÷5＝720÷9＝16×6＝720÷0＝70÷5＝25×4＝15×6＝630÷9＝84÷42＝600－50＝500×3＝0×930=125－25×2＝50×0×8＝75＋25÷5＝32÷47×12＝二、笔算。

（乘法不用验算，除法要验算）54×63＝25×38＝36×19＝774÷8＝4＋0.6= 7.3－2.9= 10－0.7= 8.2-5=三、估算。

238÷6≈ 876÷3≈ 417÷6≈ 753÷5≈89×30≈ 32×48≈ 43×22≈ 52×19=四、脱式计算。

439＋46×7 248÷4×18 67×（96÷6）25×17－120 （450－175）÷5 268+29×65 315－345÷3 574÷(125?118) 948－13×5 17×36÷3五、在里（）填上“＜”、“＞”或“=”。

246÷3（）492÷6 240÷5（）246÷6 600÷4（）700÷5 0.2（）0.02时间20分钟一、口算。

9.7+1.3= 5.4-4.5= 560÷8= 40×60=99+11= 630÷9= 70-25= 180×7=280÷4= 540÷6= 47×5= 81÷9=163+74= 350÷7= 110-30= 500÷10=111+109= 80×50= 205÷5= 22×30=770÷7= 42×6= 707-201= 19×30=40+135= 507-254= 100×10= 525-349=82×20= 17×50= 490÷7= 270÷3=90×11= 9.6-6.9= 64÷8×5= 21÷3×7=40÷5×5= 27+36-11= 90-28+7= 56÷7×6=11+30÷6= 17+8×6= 60×5÷6=二、填一填，在圆圈里填上“<”、“>”或“=”符号1.36○1.63 36000○30600 9070000○907000220000○22万9979○10979 207万○207000三、做一做27 199 35 32×27 ×12 ×18 × 17四、用竖式笔算下面各题309×17= 123×23= 516×20=800×11= 32×103= 707×33=五、用脱式计算下面各题19×5+27 136-12×10 18×27÷679+36×4 24×15÷3 44+25×5时间20分钟一、口算。

四年级口算(全套)

四年级口算(全套)第一部分：加减法口算一、加法口算1. 20以内加减法口算加法：2 + 3 = 5, 5 + 7 = 12, 8 + 9 = 17, 10 + 11 = 21, 15 + 4 = 19, 7 + 8 = 15, 12 + 3 = 15, 16 + 5 = 21, 18 + 2 = 20, 9 + 7 = 16减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 =92. 100以内加减法口算加法：23 + 45 = 68, 67 + 21 = 88, 34 + 56 = 90, 78 + 12 = 90, 54 + 32 = , 89 + 11 = 100, 76 + 23 = 99, 65 + 34 = 99, 81 + 19 = 100, 92 + 8 = 100减法：98 45 = 53, 76 23 = 53, 91 56 = 35, 67 21 = 46, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92二、减法口算1. 20以内减法口算减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 =92. 100以内减法口算46, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92三、加减混合口算1. 20以内加减混合口算加法：2 + 3 = 5, 5 + 7 = 12, 8 + 9 = 17, 10 + 11 = 21, 15 + 4 = 19, 7 + 8 = 15, 12 + 3 = 15, 16 + 5 = 21, 18 + 2 = 20, 9 + 7 = 16减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 =92. 100以内加减混合口算加法：23 + 45 = 68, 67 + 21 = 88, 34 + 56 = 90, 78 + 12 = 90, 54 + 32 = , 89 + 11 = 100, 76 + 23 = 99, 65 + 34 = 99, 81 + 19 = 100, 92 + 8 = 100减法：98 45 = 53, 76 23 = 53, 91 56 = 35, 67 21 = 46, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 100 19 = 81, 100 8 = 92四年级口算(全套)第一部分：加减法口算一、加法口算1. 20以内加减法口算15 + 4 = 19, 7 + 8 = 15, 12 + 3 = 15, 16 + 5 = 21, 18 + 2 = 20, 9 + 7 = 16减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 = 92. 100以内加减法口算加法：23 + 45 = 68, 67 + 21 = 88, 34 + 56 = 90, 78 + 12 = 90, 54 + 32 = , 89 + 11 = 100, 76 + 23 = 99, 65 + 34 = 99, 81 + 19 = 100, 92 + 8 = 100减法：98 45 = 53, 76 23 = 53, 91 56 = 35, 67 21 = 46, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92二、减法口算1. 20以内减法口算减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 = 92. 100以内减法口算减法：98 45 = 53, 76 23 = 53, 91 56 = 35, 67 21 = 46, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92三、加减混合口算1. 20以内加减混合口算15 + 4 = 19, 7 + 8 = 15, 12 + 3 = 15, 16 + 5 = 21, 18 + 2 = 20, 9 + 7 = 16减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 =92. 100以内加减混合口算加法：23 + 45 = 68, 67 + 21 = 88, 34 + 56 = 90, 78 + 12 = 90, 54 + 32 = , 89 + 11 = 100, 76 + 23 = 99, 65 + 34 = 99, 81 + 19 = 100, 92 + 8 = 100减法：98 45 = 53, 76 23 = 53, 91 56 = 35, 67 21 = 46, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92四、乘法口算1. 两位数乘以一位数口算乘法：23 × 4 = 92, 56 × 7 = 392, 78 × 9 = 702, 45 × 8 = 360, 67 × 3 = 201, 89 × 5 = 445, 76 × 2 = 152, 65× 6 = 390, 81 × 1 = 81, 92 × 3 = 2762. 两位数乘以两位数口算乘法：23 × 45 = 1035, 56 × 78 = 4368, 78 × 56 = 4368, 45 × 67 = 3015, 67 × 89 = 5943, 89 × 76 = 6764, 76× 65 = 4940, 65 × 81 = 5265, 81 × 92 = 7452, 92 × 67 = 6164五、除法口算1. 两位数除以一位数口算除法：92 ÷ 4 = 23, 4368 ÷ 7 = 624, 702 ÷ 9 = 78, 360 ÷ 8 = 45, 201 ÷ 3 = 67, 445 ÷ 5 = 89, 152 ÷ 2 = 76, 390 ÷ 6 = 65, 81 ÷ 1 = 81, 276 ÷ 3 = 922. 两位数除以两位数口算除法：1035 ÷ 45 = 23, 4368 ÷ 78 = 56, 4368 ÷ 56 = 78, 3015 ÷ 67 = 45, 5943 ÷ 89 = 67, 6764 ÷ 76 = 89, 4940÷ 65 = 76, 5265 ÷ 81 = 65, 7452 ÷ 92 = 81, 6164 ÷ 67 = 92四年级口算(全套)第一部分：加减法口算一、加法口算1. 20以内加减法口算加法：2 + 3 = 5, 5 + 7 = 12, 8 + 9 = 17, 10 + 11 = 21, 15 + 4 = 19, 7 + 8 = 15, 12 + 3 = 15, 16 + 5 = 21, 18 + 2 = 20, 9 + 7 = 16减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 =92. 100以内加减法口算加法：23 + 45 = 68, 67 + 21 = 88, 34 + 56 = 90, 78 + 12 = 90, 54 + 32 = , 89 + 11 = 100, 76 + 23 = 99, 65 + 34 = 99, 81 + 19 = 100, 92 + 8 = 10046, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92二、减法口算1. 20以内减法口算减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 =92. 100以内减法口算减法：98 45 = 53, 76 23 = 53, 91 56 = 35, 67 21 = 46, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92三、加减混合口算1. 20以内加减混合口算加法：2 + 3 = 5, 5 + 7 = 12, 8 + 9 = 17, 10 + 11 = 21, 15 + 4 = 19, 7 + 8 = 15, 12 + 3 = 15, 16 + 5 = 21, 18 + 2 = 20, 9 + 7 = 16减法：10 3 = 7, 15 8 = 7, 12 4 = 8, 20 9 = 11, 16 7 = 9, 18 5 = 13, 11 6 = 5, 17 8 = 9, 14 7 = 7, 19 10 =92. 100以内加减混合口算加法：23 + 45 = 68, 67 + 21 = 88, 34 + 56 = 90, 78 + 12 = 90, 54 + 32 = , 89 + 11 = 100, 76 + 23 = 99, 65 + 34 = 99, 81 + 19 = 100, 92 + 8 = 10046, 84 32 = 52, 100 11 = 89, 99 23 = 76, 95 34 = 61, 10019 = 81, 100 8 = 92四、乘法口算1. 两位数乘以一位数口算乘法：23 × 4 = 92, 56 × 7 = 392, 78 × 9 = 702, 45 × 8 = 360, 67 × 3 = 201, 89 × 5 = 445, 76 × 2 = 152, 65× 6 = 390, 81 × 1 = 81, 92 × 3 = 2762. 两位数乘以两位数口算乘法：23 × 45 = 1035, 56 × 78 = 4368, 78 × 56 = 4368, 45 × 67 = 3015, 67 × 89 = 5943, 89 × 76 = 6764, 76 × 65 = 4940, 65 × 81 = 5265, 81 × 92 = 7452, 92 × 67 = 6164五、除法口算1. 两位数除以一位数口算除法：92 ÷ 4 = 23, 4368 ÷ 7 = 624, 702 ÷ 9 = 78, 360 ÷ 8 = 45, 201 ÷ 3 = 67, 445 ÷ 5 = 89, 152 ÷ 2 = 76, 390 ÷ 6 = 65, 81 ÷ 1 = 81, 276 ÷ 3 = 922. 两位数除以两位数口算除法：1035 ÷ 45 = 23, 4368 ÷ 78 = 56, 4368 ÷ 56 = 78, 3015 ÷ 67 = 45, 5943 ÷ 89 = 67, 6764 ÷ 76 = 89, 4940 ÷ 65 = 76, 5265 ÷ 81 = 65, 7452 ÷ 92 = 81, 6164 ÷ 67 = 92六、分数口算1. 分数加减法口算加法：1/2 + 1/4 = 3/4, 3/4 + 1/3 = 13/12, 2/5 + 1/10 = 3/10, 1/6 + 1/8 = 7/24, 3/8 + 1/4 = 5/8, 1/3 + 1/6 = 1/2,2/7 + 1/14 = 3/14, 1/5 + 1/10 = 3/10, 3/4 + 1/2 = 5/4, 1/8 + 1/4 = 3/8减法：3/4 1/2 = 1/4, 13/12 1/3 = 11/12, 3/10 1/5 = 1/10, 7/24 1/6 = 1/12, 5/8 1/4 = 3/8, 1/2 1/3 = 1/6, 3/14 2/7 = 1/14, 3/10 1/5 = 1/10, 5/4 3/4 = 1/2, 3/8 1/8 = 1/42. 分数乘除法口算乘法：1/2 × 1/3 = 1/6, 3/4 × 1/2 = 3/8, 2/5 × 1/10 = 1/25, 1/6 × 1/8 = 1/48, 3/8 × 1/4 = 3/32, 1/3 × 1/6 =1/18, 3/14 × 2/7 = 3/49, 1/5 × 1/10 = 1/50, 5/4 × 3/4 =15/16, 3/8 × 1/8 = 3/64除法：1/2 ÷ 1/3 = 3/2, 3/4 ÷ 1/2 = 3/2, 1/5 ÷ 1/10 = 2, 1/6 ÷ 1/8 = 4/3, 3/8 ÷ 1/4 = 3, 1/3 ÷ 1/6 = 2, 3/14 ÷ 2/7 = 3/4, 1/5 ÷ 1/10 = 2, 5/4 ÷ 3/4 = 5/3, 3/8 ÷ 1/8 = 3。

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计算训练一一、口算。

300÷5＝720÷9＝16×6＝720÷0＝70÷5＝25×4＝15×6＝630÷9＝84÷42＝600－50＝500×3＝0×930=125－25×2＝50×0×8＝75＋25÷5＝32÷47×12＝二、笔算。

(乘法不用验算,除法要验算)54×63＝25×38＝36×19＝774÷8＝4＋0、6= 7、3－2、9= 10－0、7= 8、2-5=三、估算。

238÷6≈ 876÷3≈ 417÷6≈ 753÷5≈89×30≈ 32×48≈ 43×22≈ 52×19=四、脱式计算。

439＋46×7 248÷4×18 67×(96÷6) 25×17－120 (450－175)÷5 268+29×65 315－345÷3 574÷(125?118) 948－13×5 17×36÷3 五、在里()填上“＜”、“＞”或“=”。

246÷3( )492÷6 240÷5( )246÷6 600÷4( )700÷5 0、2( )0、023、5( )3、47 1、2( )0、98 1、4 ( )1、36 1、08 ( ) 0、99 7、01 ( )7、10计算训练二一、口算。

9、7+1、3= 5、4-4、5= 560÷8= 40×60=99+11= 630÷9= 70-25= 180×7=280÷4= 540÷6= 47×5= 81÷9=163+74= 350÷7= 110-30= 500÷10=111+109= 80×50= 205÷5= 22×30=770÷7= 42×6= 707-201= 19×30=40+135= 507-254= 100×10= 525-349=82×20= 17×50= 490÷7= 270÷3=90×11= 9、6-6、9= 64÷8×5= 21÷3×7=40÷5×5= 27+36-11= 90-28+7= 56÷7×6=11+30÷6= 17+8×6= 60×5÷6=二、填一填,在圆圈里填上“<”、“>”或“=”符号1、36○1、63 36000○30600 9070000○907000220000○22万9979○10979 207万○207000三、做一做27 199 35 32×27 ×12 ×18 × 17 四、用竖式笔算下面各题309×17= 123×23= 516×20=800×11= 32×103= 707×33=五、用脱式计算下面各题19×5+27 136-12×10 18×27÷679+36×4 24×15÷3 44+25×5计算训练三一、口算。

77÷11 = 16×10 = 18+9 = 32÷4 = 14×4=6×17 = 264÷11= 10+11 = 14-8 = 5+15=18 - 3 = 24×11 = 180÷12 = 240÷10 = 20×3 =23×27 = 392÷28 = 24×5 = 5×23 = 22-10 =21×22 = 21+9= 21-8= 6-5= 9-3=132÷11= 11+17= 66÷3= 130÷10= 22×22=7-5+21= 6+4-4= 19-7+13= 8×5×24=21+6×25= 19+3+6= 5×12×24= 8×11-10=12-6+15= 75÷5×6= 8×6-34= 6×13-22=16+12-13= 9-4+5= 10+8×22= 13+15-5=20+3-23= 13-11-2 = 8+20-27= 11+14+5=二、填一填、在圆圈里填上“＜”“＞”或“=”符号。

7、8○8、0 0、8元○1、1元 40×91○36003元1角○3、1元 9分米○90厘米 568÷8○568÷9三、估算。

83×29 ≈ 92×11≈ 49÷5≈ 452÷9≈四、用竖式笔算下面各题。

26×35= 84×13= 426÷6=535÷5= 28、3—2、7= 704÷4=五、用脱式计算下面各题。

81×7÷9 294＋399÷7 576÷3÷4= = == = =85÷5+988 16×(57÷3 ) 638－17×35= = == = =计算训练四一、口算。

18-7 = 216÷9 = 19 - 15 = 16 - 14 = 345 ÷ 15 = 5×25 = 17×30 = 24 + 6 = 72 ÷ 3 = 23 × 18 = 14-8 = 16 × 13 = 161 ÷ 23 = 10 × 14 = 22 - 20 =17 - 15 = 14 - 14 = 133 ÷ 7 = 600 ÷ 24 = 216 ÷ 9 =13 + 13 = 5 × 8 = 6 + 6 = 11 + 12 = 198 ÷ 22 =15 - 11 = 8 + 21 = 25 + 4 = 9 + 3 = 225 ÷ 9 =14 - 11 + 23 = 13 + 15 + 2 = 7 + 7 - 13 = 153 ÷ 17 - 9 =25 × 22 ÷ 11 = 10 × 7 - 50 = 7 + 6 ÷ 6 = 26 - 8 + 9 =26 - 26 + 14 = 13 + 17 - 24 = 25 + 4 - 12 = 6 + 8 × 21 =16 - 11 + 18 = 26 - 19 + 8 = 17 - 10 ÷ 10 = 72 ÷ 8×10 =10 - 8 + 14 = 25 - 5 - 10 = 19 - 5 - 10 = 10× 23 - 172 =二、填一填、在圆圈里填上“＜”“＞”或“=”符号7、8○8、0 0、8元○1、1元 40×91○36003元1角○3、1元 9分米○90厘米 568÷8○568÷9三、用竖式笔算下面各题47×86= 495÷5= 205÷3= 33 × 37= 540×18= 1530÷310= 140×45= 725÷25=四、用脱式计算下面各题6 × 28 - 156 15 × 11 - 96 552 ÷ 24 × 3= = == = =23 × 4 ÷ 27 24 × 3 - 15 9 + 21 × 14= = == = =计算训练五一、口算。

50×400＝20×0＝ 505÷5＝ 100÷100＝560÷7= 903÷3＝1、6＋2、4＝ 0、8＋1、6＝ 5、6－3、8＝60×30=21×40= 300＋400= 140÷5＝ 125×8＝ 560＋80=4、8＋7、9＝9、7－5、6＝ 56÷8＋3= 0×4÷2= 26－5×4=25 + 5 × 7 = 22 - 21 ÷ 21 = 18 + 4 - 5 = 10 × 30 × 14 =21 + 9 × 29 = 9 - 8 + 29 = 8 + 8 × 26 = 20 × 25 - 400 =10 × 6 × 13 = 20 + 7 + 1 = 26 - 16 - 10 = 21 + 8 - 15 =20 - 14 - 3 = 13 - 8 + 24 = 25 + 5 × 27 = 18 ÷ 3 ÷ 6 =21 + 4 + 4 = 22 + 8 × 30 = 9 - 5 - 3 = 26 - 19 + 23 =二、换算。

35厘米＝( )米 800平方厘米＝( )平方分米3吨＝( )千克 3角5分＝( )元三、在○里填上“>”“<”或“=”。

601200○6000120 克○501千克402万○402000 500千米○500000米四、用竖式笔算下面各题1029 ÷ 49 = 41 × 45 = 722 ÷ 19 = 312 ÷ 39 =555 ÷ 15 = 41 × 24 = 24 × 19 = 1216 ÷ 32 =五、用脱式计算下面各题33 + 8 × 23 528 ÷ 33 - 7 792 ÷ 44 × 20= = == = =26 + 12 × 7 25 × 9 ÷ 8 13 + 11 × 14= = == = =计算训练六一、口算。