55*0.3-3*0.3等于几
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55*0.3-3*0.3等于几
55*0.3-3*0.3等于几
55*0.3-3*0.3等于几
55×0.3 - 3×0.3
= 0.3×(55 - 3)
= 0.3×52
= 15.6
那个*是乘号吧,那么就等于(55-3)*0.3=15.6
55*0.3-3*0.3等于几
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