9.87乘5.7减98.7加0.987乘43巧算

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9.87乘5.7减98.7加0.987乘43巧算

9.87乘5.7减98.7加0.987乘43巧算
9.87乘5.7减98.7加0.987乘43巧算

9.87乘5.7减98.7加0.987乘43巧算
9.87×5.7-98.7+0.987×43 =(5.7+(43÷10))×9.87-98.7=0

=9.87×5.7-9.87×10+9.87×4.3
=9.87×(5.7+4.3-10)
=9.87×0
=0