7.2×8.12+0.72×8.8简便方法?
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7.2×8.12+0.72×8.8
=7.2×8.12+(0.72×10)×(8.8÷10)
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=7.2×(10-1)
=7.2×10-7.2×1
=72-7.2
=64.8
=7.2×8.12+(0.72×10)×(8.8÷10)
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=7.2×(10-1)
=7.2×10-7.2×1
=72-7.2
=64.8
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7.2×8.12+0.72×8.8
=7.2×8.12+0.72×10×0.88
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=7.2×(10—1)
=7.2×10-7.2×1
=72-7.2
=64.8
=7.2×8.12+0.72×10×0.88
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=7.2×(10—1)
=7.2×10-7.2×1
=72-7.2
=64.8
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7.2×8.12+0.72×8.8
=7.2×8.12+7.2×0.1×8.8
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=(7+0.2)×9
=7×9+0.2×9
=63+1.8
=64.8
=7.2×8.12+7.2×0.1×8.8
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=(7+0.2)×9
=7×9+0.2×9
=63+1.8
=64.8
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解:
7.2×8.12+0.72×8.8
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=64.8
∴7.2×8.12+0.72×8.简便计算等于64.8
7.2×8.12+0.72×8.8
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=64.8
∴7.2×8.12+0.72×8.简便计算等于64.8
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用简便计算过程为
原式=7.2x8.12+7.2x0.88
=7.2x(8.12+0.88)
=7.2x9
=64.8
原式=7.2x8.12+7.2x0.88
=7.2x(8.12+0.88)
=7.2x9
=64.8
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