中括号里7.1-,5.6括号。乘0.9-1.15中括号。除以2.5的解析。
(3.2×1.5+2.5)÷1.65.8×(3.87-0.13)+4.2×3.74[(7.1-5.6)×0.9-1.15]÷2.585+14×(14+208÷26)...
(3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
[(7.1-5.6)×0.9-1.15]÷2.5
85+14×(14+208÷26) 展开
5.8×(3.87-0.13)+4.2×3.74
[(7.1-5.6)×0.9-1.15]÷2.5
85+14×(14+208÷26) 展开
1个回答
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(1)(3.2×1.5+2.5)÷1.6
=(4.8+2.5)÷1.6
=7.3÷1.6
=4.5625;
(2)5.8×(3.87-0.13)+4.2×3.74
=5.8×3.74+4.2×3.74
=(5.8+4.2)×3.74
=10×3.74
=37.4;
(3)[(7.1-5.6)×0.9-1.15]÷2.5
=[1.5×0.9-1.15]÷2.5
=[1.35-1.15]÷2.5
=0.2÷2.5
=0.08;
(4)85+14×(14+208÷26)
=85+14×(14+8)
=85+14×22
=85+308
=393.
=(4.8+2.5)÷1.6
=7.3÷1.6
=4.5625;
(2)5.8×(3.87-0.13)+4.2×3.74
=5.8×3.74+4.2×3.74
=(5.8+4.2)×3.74
=10×3.74
=37.4;
(3)[(7.1-5.6)×0.9-1.15]÷2.5
=[1.5×0.9-1.15]÷2.5
=[1.35-1.15]÷2.5
=0.2÷2.5
=0.08;
(4)85+14×(14+208÷26)
=85+14×(14+8)
=85+14×22
=85+308
=393.
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