48563946 发表于 2017-9-20 12:04:39

苏教版四年级下册数学第6章第52、53页练习十补充习题详细解答过程和答案

练习十第1题详细解答过程和答案
乘法结合律 
乘法交换律和结合律 
乘法分配律
练习十第2题详细解答过程和答案
√x√x
练习十第3题详细解答过程和答案
=18x(200+1)
=18x200+18
=3600+18
=3618 
=125x8+125x20
=1000+2500
=3500 
=15x2x27
=30x27
=810 
=76x(100-1)
=76x100-76
=7600-76
=7524
=27x(38+62)
=27x100 
=2700
=84x(99+1)
=84x100 
=8400
练习十第4题详细解答过程和答案
=45x(20-2)
=45x20-45x2
=900-90
=810 
=71x(100+1)
=71x100+71
=7100+71
=7171
=29x(4x5)
=29x20 
=580 
=25x4x9
=100x9
=900 
=35x(10+2)
=35x10+35x2
=350+70
=420 
=6x5x17
=30x17
=510
练习十第5题详细解答过程和答案
(1)480    480
(2)5544    5501
练习十第6题详细解答过程和答案
=7x(256-56)
=7x200
=1400
=78x(101-1)
=78x100 
=7800 
=43x(169-69)
=43x100
=4300 
=84x(100-1)
=84x100-84
=8400-84
=8316
练习十第7题详细解答过程和答案
108×12=1296(人)
练习十第8题详细解答过程和答案
黄瓜:15×18=270(棵)
茄子:15×8=120(棵)
270-120=150(棵)
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