1.简便运算.①62.8×19+8×62.8-62.8=?②(1-1%×70)÷2/7=?
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1.简便运算.①62.8×19+8×62.8-62.8=?②(1-1%×70)÷2/7=?
1.简便运算.①62.8×19+8×62.8-62.8=?②(1-1%×70)÷2/7=?
1.简便运算.①62.8×19+8×62.8-62.8=?②(1-1%×70)÷2/7=?
.①62.8×19+8×62.8-62.8
=62.8(19+8-1)
=62.8*26
=1632.8
②(1-1%×70)÷2/7
=(1-7/10)*7/2
=7/2-49/20
=21/20
1
=62.8x(19+8-1)=62.8x26=1632.8
2
=(1-0.7)x7/2=2.1/2=1.05纳尼?!这对吗?这是简算 么。如果你题目没写错的话我要的是简算啊。。。等你找到简算的方法,我都可以列几十个竖式了。。。现在学校的教学方法真是有毛病。但是题目就是要你简算啊?打出来-过程62.8x26=62.8x(25+1)=62.8x25+62.8=6280/4...
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1
=62.8x(19+8-1)=62.8x26=1632.8
2
=(1-0.7)x7/2=2.1/2=1.05
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1, =62.8x(19+8-1) 2.=.1x7/2-70/100x7/2
=62.8x26