2.5÷0.5=
=
2.4×0.5=
2.5×0.4=
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x+18-25=43 27x+31x=145 7x-16×4=27
6×0.8+7x=19.5 x-0.8x=10 3.6x÷2=2.16
列式:60÷480
列式:(15﹣5)÷