题目内容

【题目】怎样简便就怎样算。

45.55-(6.82+15.55)         34.52-17.87-12.13

4.57+3.17+3.43+5.83 23.75-8.64-3.36

【答案】23.18 4.52 17 11.75

【解析】

45.55-(6.82+15.55)

=45.55-15.55-6.82

=30-6.82

=23.18

34.52-17.87-12.13

=34.52-(17.87+12.13)

=34.52-30

=4.52

4.57+3.17+3.43+5.83

=(4.57+3.43)+(3.17+5.83)

=8+9

=17

23.75-8.64-3.36

=23.75-(8.64+3.36)

=23.75-12

=11.75

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