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(3.2×1.5+2.5)÷1.6

来源:学生作业帮 编辑:拍题作业网作业帮 分类:数学作业 时间:2024/04/16 22:46:48
(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)
(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.