2.4乘0.99减4.9乘0.24怎么简算?

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2.4乘0.99减4.9乘0.24怎么简算?2.4乘0.99减4.9乘0.24怎么简算?2.4乘0.99减4.9乘0.24怎么简算?原式=0.24*9.9-0.24*4.9=0.24*(9.9-4.9

2.4乘0.99减4.9乘0.24怎么简算?
2.4乘0.99减4.9乘0.24怎么简算?

2.4乘0.99减4.9乘0.24怎么简算?
原式=0.24*9.9-0.24*4.9 =0.24*(9.9-4.9) =0.24*5=1.2

=2.4(1-0.01)-(5-0.1)0.24
=2.4-0.024-5*0.24+0.024
=3.6

2.4×0.99-4.9×0.24
= 2.4×0.99-0.49×2.4
= 2.4×(0.99-0.49)
=2.4×0.5
=1.2