简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15 (3)2/9÷7+7/9×1/7 (4)6/7×【2/3-(5/12-1/3)】
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 16:51:49
![简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15 (3)2/9÷7+7/9×1/7 (4)6/7×【2/3-(5/12-1/3)】](/uploads/image/z/69423-15-3.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+%EF%BC%881%EF%BC%8916.4-3.5%2B83.6-26.5+%EF%BC%882%EF%BC%89%EF%BC%881%2F3-1%2F5%2B4%2F15%EF%BC%89%C3%9715%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+%EF%BC%881%EF%BC%8916.4-3.5%2B83.6-26.5+%EF%BC%882%EF%BC%89%EF%BC%881%2F3-1%2F5%2B4%2F15%EF%BC%89%C3%9715+%EF%BC%883%EF%BC%892%2F9%C3%B77%2B7%2F9%C3%971%2F7+%EF%BC%884%EF%BC%896%2F7%C3%97%E3%80%902%2F3-%EF%BC%885%2F12-1%2F3%EF%BC%89%E3%80%91)
简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15 (3)2/9÷7+7/9×1/7 (4)6/7×【2/3-(5/12-1/3)】
简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15
简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15 (3)2/9÷7+7/9×1/7 (4)6/7×【2/3-(5/12-1/3)】
简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15简便计算 (1)16.4-3.5+83.6-26.5 (2)(1/3-1/5+4/15)×15 (3)2/9÷7+7/9×1/7 (4)6/7×【2/3-(5/12-1/3)】
(1)16.4-3.5+83.6-26.5
=(16.4+83.6)-(3.5+26.5)
=100-30
=70
(2)(1/3-1/5+4/15)×15
=1/3×15-1/5×15+4/15×15
=5-3+4
=6
(3)2/9÷7+7/9×1/7
=2/9×1/7+7/9×1/7
=(2/9+7/9)×1/7
=1×1/7
=1/7
(4)6/7×【2/3-(5/12-1/3)】
=6/7×(2/3-5/12+1/3)
=6/7×【(2/3+1/3)-5/12】
=6/7×(1-5/12)
=6/7×7/12
=1/2
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