75%= ：4=== 小数．
× = ×=÷ =1．
7.5÷ =0.075 2.74× =2740．
× = ÷= × ．
被除数减去商和除数的积一定等于0． ．
由乘法算式□×4=△写出除法算式是： ÷ = ；除法是 的逆运算．
=
= 小数．
× = ×
=
÷ =1．
× = ÷
= × ．
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