1.25乘9.1乘0.7加1.25乘9.1乘0.1简便计算,

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1.25乘9.1乘0.7加1.25乘9.1乘0.1简便计算,
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1.25乘9.1乘0.7加1.25乘9.1乘0.1简便计算,
1.25乘9.1乘0.7加1.25乘9.1乘0.1简便计算,

1.25乘9.1乘0.7加1.25乘9.1乘0.1简便计算,
1.25乘9.1乘0.7加1.25乘9.1乘0.1
=1.25乘9.1乘(0.7加0.1)
=1.25X9.1X0.8
=1.25X0.8X9.1
=9.1

童鞋你几岁?

=1.25×9.1×(0.7+0.1)
=1.25×0.8×9.1
=1×9.1
=9.1