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[﹙﹣6﹣9/2﹚÷19/4]÷[﹙2﹣10/3﹚×6/5] ﹙﹣2.3﹚×﹙+3.85﹚+﹙﹣4.3﹚×﹙3.85﹚+

来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/18 01:52:41
[﹙﹣6﹣9/2﹚÷19/4]÷[﹙2﹣10/3﹚×6/5] ﹙﹣2.3﹚×﹙+3.85﹚+﹙﹣4.3﹚×﹙3.85﹚+8×77/20(要过
[﹙﹣6﹣9/2﹚÷19/4]÷[﹙2﹣10/3﹚×6/5] ﹙﹣2.3﹚×﹙+3.85﹚+﹙﹣4.3﹚×﹙3.85﹚+
[﹙﹣6﹣9/2﹚÷19/4]÷[﹙2﹣10/3﹚×6/5]
=[﹙﹣21/2﹚×4/19]÷[﹙-4/3﹚×6/5]
=[﹣42/19]÷[-8/5]
=(-42/19)×(-5/8)
=210/152
﹙﹣2.3﹚×﹙+3.85﹚+﹙﹣4.3﹚×﹙3.85﹚+8×77/20
=﹣2.3×3.85﹣4.3×3.85+8×3.85
=(﹣2.3﹣4.3+8)×3.85
=1.4×3.85
=0.7*7.7
=5.39