3.75*0.5-2.75/2 6.3/1.8 9.5/(1.9/8) (7.7+1.54)/0.7 (11.7-9.9
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/24 05:58:41
3.75*0.5-2.75/2 6.3/1.8 9.5/(1.9/8) (7.7+1.54)/0.7 (11.7-9.9)/0.9 用简便方法计算
3.75*0.5-2.75/2
=3.75/2-2.75/2
=(3.75-2.75)/2
=1/2=0.5
6.3/1.8=3.5
9.5/(1.9/8)=9.5/1.9*8=5*8=40
(7.7+1.54)/0.7
=7.7/7+1.54/7
=1.1+0.22
=1.32
(11.7-9.9)/0.9
=11.7/0.9-9.9/0.9
=13-11
=2
再问: 6.3/1.8能简便方法吗?
再答: =(0.9*7)/(0.9*2)(约分) =7/2 =3.5 这样做还比较麻烦,不如直接得出结果
=3.75/2-2.75/2
=(3.75-2.75)/2
=1/2=0.5
6.3/1.8=3.5
9.5/(1.9/8)=9.5/1.9*8=5*8=40
(7.7+1.54)/0.7
=7.7/7+1.54/7
=1.1+0.22
=1.32
(11.7-9.9)/0.9
=11.7/0.9-9.9/0.9
=13-11
=2
再问: 6.3/1.8能简便方法吗?
再答: =(0.9*7)/(0.9*2)(约分) =7/2 =3.5 这样做还比较麻烦,不如直接得出结果
3.75*0.5-2.75/2 6.3/1.8 9.5/(1.9/8) (7.7+1.54)/0.7 (11.7-9.9
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