7.25×3.54用简便方法怎么算
7.25×3.54用简便方法怎么算
=(7.254)0.885
=290/885
=25.665
12.5+7.5+3.54用简便方法计算。
12.5+7.5+3.54
=(12.5+7.5)+3.54
=20+3.54
=23.54
解析:本题运用了“加法结合律”。将“12.5+7.5”算出得数可得整数,再加上3.54就可以了。
3.54-2.75 6.46-6.25用简便方法怎么算24点
3.54-2.75+6.46-6.25
=(3.54+6.46)-(2.75+6.25)
=10-9
=1
18.84-8.46+3.54用简便方法怎么做
这哪有简便方法?
18.84-8.46+3.54
=10.38+3.54
=13.92
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7.25-2.25/5怎么用简便方法计算
=7.25-0.45
=7.25-1+0.55
=6.25+0.55
=6.8
7.25乘87.8乘0.8简便方法怎么计算
7.25乘87.8乘0.8简便方法怎么计算
=7.25×0.8×87.8
=5.8×87.8
=509.24
用简便方法计算 27.63减3.54减17.63减2.46
原式
=27.63-3.54-17.63-2.46
=(27.63-17.63)-(3.54+2.46)
=10-6
=4
供参考。
7.25×67.875×0.7875 7.250×0.053375用简便方法计算
7.25×67.875+725×0.7875+7250×0.053375
=7.25×67.875+7.25×78.75+7.25×53.375
=7.25×(67.875+78.75+53.375)
=7.25×(67.875+53.375+78.75)
=7.25×(121.25+78.75)
=7.25×200
=1450
7.25ⅹ0.4一7.25x0.3用简便方法
原式=7.25x(0.4-0.3)
=7.25x0.1
=0.725
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7.25x(13.1÷8.1)÷0.4用简便方法计算
7.25x(13.1÷8.1)÷0.4
=7.25x(131/81)÷(10/4)
=7.25x131/81x4/10
=7.25x4x131/(81x10)
=29x131/810
=3799/810
=4(559/810)
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