52.3×0.9+5.23
=52.3×0.9+52.3×0.1
=52.3*(0.9+0.1)
=52.3*1
=52.3
52.3×0.9+5.23
=5.23×9+5.23
=5.23(9+1)
=5.23*10
=52.3
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你好:
52.3×0.9+5.23
=5.23×9+5.23×1
=5.23×(9+1)
=5.23×10
=52.3
=5.23*10*0.9+5.23*1
=5.23*9+5.23*1
=5.23*(9+1)
=5.23*10
=52.3
52.3*(1-0.1)+5.23
= 52.3-5.23+5.23
=52.3