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苏教版五年级上册数学补充习题第87页答案

2023-11-12 16:00| 查看: 711

2.数的世界(2)
1.
3.2  0.09  70
3.1  4  3

2.

3.
7.95+0.46+9.54
=7.95+(0.46+9.54 )
=7.95+10
=17.95

5.4×0.33+5.4×0.67
=5.4×(0.33+0.67)
=5.4×1
=5.4

9÷0.75+9÷0.75
=(9+9)÷0.75
=18÷0.75
=24

4.56×[1÷(4.1-4.09)]
=4.56×[1÷0.01]
=4.56×100
=456

4.
9.8-1.4-2.1=6.3(吨)
6.3÷3=2.1(吨)
答:还剩6.3吨,如果剩下的货物要分3次运完,平均每次运2.1吨。
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