题目内容

【题目】计算下面各题,能简算的要简算。

⑴9.86-3.4÷1.7×1.3 ⑵0.36×3.9+3.9×1.64

⑶7.23-(2.8+1.23) ⑷1.64×2.5+2.1÷0.6

⑸2.4×(0.85÷1.7)-1.08 ⑹0.04×[(17.6-14.1)÷1.4]

【答案】(1)7.26 (2)7.8 (3)3.2 (4)7.6 (5)0.12 (6)0.1

【解析】

⑴9.86-3.4÷1.7×1.3

=9.86-2×1.3

=9.86-2.6

=7.26

⑵0.36×3.9+3.9×1.64

=3.9×(0.36+1.64)

=3.9×2

=7.8

⑶7.23-(2.8+1.23)

=7.23-1.23-2.8

=6-2.8

=3.2

⑷1.64×2.5+2.1÷0.6

=4.1+3.5

=7.6

⑸2.4×(0.85÷1.7)-1.08

=2.4×0.5-1.08

=1.2-1.08

=0.12

⑹0.04×[(17.6-14.1)÷1.4]

=0.04×(3.5÷1.4)

=0.04×2.5

=0.1

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