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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