99乘2.45怎么简算?

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99乘2.45怎么简算?99乘2.45怎么简算?99乘2.45怎么简算?99乘2.45=99X2.45=(100-1)X2.45=100X2.45-1X2.45=245-2.45=242.5599*2

99乘2.45怎么简算?
99乘2.45怎么简算?

99乘2.45怎么简算?
99乘2.45
=99X2.45
=(100-1)X2.45
=100X2.45-1X2.45
=245-2.45
=242.55

99*2.45=(100-1)*2.45=245-2.45=242.55

99乘2.45
=100×2.45-1×2.45
=245-2.45
=242.55

99乘2.45
=(100-1)*2.45
=100*2.45-2.45
=245-2.45
=242.55