每份數(shù)×份數(shù)＝總數(shù)；總數(shù)÷每份數(shù)＝份數(shù)；總數(shù)÷份數(shù)＝每份數(shù)；1倍數(shù)×倍數(shù)＝幾倍數(shù)；幾倍數(shù)÷1倍數(shù)＝倍數(shù)；幾倍數(shù)÷倍數(shù)＝1倍數(shù)；速度×?xí)r間＝路程；路程÷速度＝時間；路程÷時間＝速度。

常用的數(shù)量關(guān)系式

1、被除數(shù)÷除數(shù)＝商；被除數(shù)÷商＝除數(shù)；商×除數(shù)＝被除數(shù)

2、因數(shù)×因數(shù)＝積；積÷一個因數(shù)＝另一個因數(shù)

3、被減數(shù)－減數(shù)＝差；被減數(shù)－差＝減數(shù)；差＋減數(shù)＝被減數(shù)

4、單價×數(shù)量＝總價；總價÷單價＝數(shù)量；總價÷數(shù)量＝單價

5、工作效率×工作時間＝工作總量；工作總量÷工作效率＝工作時間；工作總量÷工作時間＝工作效率

6、加數(shù)＋加數(shù)＝和；和－一個加數(shù)＝另一個加數(shù)