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苏教版五年级上册数学补充习题第66页答案

2023-11-12 11:26| 查看: 789

15.小数四则混合运算练习
1.
×   ÷
÷   +

2.
7.32   2.68
0.3     0.2
1.75   1
5.8     1

3.
0.8×0.68×125
=0.8×125×0.68
=100x0.68
=68

90-3.54-11.46
=90-(3.54+11.46)
=90-15
=75

3.6÷0.4-1.2×5
=9-6
=3

0.73×99+0.73
=0.73×(99+1)
=0.73×100
=73

(31.6-11.7)÷2.5÷0.4
=(31.6-11.7)÷(2.5×0.4)
=19.9÷1
=19.9

3.75×99
=3.75×100-3.75
=375-3.75
=371.25
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