简便计算:(1) 12.6÷5.6×0.8 (2) 4.5×78÷1.3 (3) 15.79÷4-3.79×0.25
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/04/30 15:36:19
简便计算:(1) 12.6÷5.6×0.8 (2) 4.5×78÷1.3 (3) 15.79÷4-3.79×0.25
(1)12.6÷5.6×0.8
=2.25×0.8
=1.8
(2)4.5×78÷1.3
=351÷1.3
=270
(3)15.79÷4-3.79×0.25
=15.79× 1 -3.79×1
- -
4 4
=1
- ×(15.79-3.79)
4
=1
- ×12
4
=3
=2.25×0.8
=1.8
(2)4.5×78÷1.3
=351÷1.3
=270
(3)15.79÷4-3.79×0.25
=15.79× 1 -3.79×1
- -
4 4
=1
- ×(15.79-3.79)
4
=1
- ×12
4
=3
简便计算:(1) 12.6÷5.6×0.8 (2) 4.5×78÷1.3 (3) 15.79÷4-3.79×0.25
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