8.7乘6加0.5乘87怎样简便?

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8.7乘6加0.5乘87怎样简便?
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8.7乘6加0.5乘87怎样简便?
8.7乘6加0.5乘87怎样简便?

8.7乘6加0.5乘87怎样简便?
8.7x6+0.5x87
=87x0.6+87x0.5
=87x(0.6+0.5)
=87x(1+0.1)
=87+8.7
=95.7

原式=8.7*6+8.7*5=8.7*11

8.7*6+0.5*87
=8.7*6+5*8.7
=8.7*(5+6)
=8.7*11
=95.7

8.7×6+0.5×87
=87×0.6+0.5×87
=87×(0.6+0.5)
=87×1.1
=87×(1+0.1)
=87×1+87×0.1
=87+8.7
=95.7