五年級(jí)數(shù)學(xué)小數(shù)除法.ppt

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小數(shù)除以整數(shù),小王堅(jiān)持晨練,他計(jì)劃4周跑步22.4千米,平均每周應(yīng)跑多少千米?,22.44=,22.4,4,5,20,,2 4,,6,2 4,,0,1、按照整數(shù)除法的法則去除,2、商的小數(shù)點(diǎn)要和被除數(shù)的 小數(shù)點(diǎn)對(duì)齊。,3、下面不用寫小數(shù)點(diǎn)。,小王堅(jiān)持晨練,他計(jì)劃4周跑步22.4千米,平均每周應(yīng)跑多少千米?,22.44=,5.6(千米),答:平均每周應(yīng)跑5.6千米.,9.6,3,3,9,,6,,2,6,,0,28.56,14,2,28,,56,,56,,0,04,4,28,,1 4,,1 4,,2,29.4,7,0,給豎式的商點(diǎn)上小數(shù)點(diǎn).,商的小數(shù)點(diǎn)要和被除數(shù)的 小數(shù)點(diǎn)對(duì)齊。,9.6= 18.214=,9.6,,2,8,,1 6,,4,1 6,,0,18.2,14,1,14,,4 2,,3,4 2,,0,2.4,1.3,筆算.,整數(shù)部分除完后商應(yīng)先點(diǎn)上小數(shù)點(diǎn), 然后把十分位上,91.89= 42.847=,117.525= 642.846=,11.5,12.6,叔叔的汽車5小時(shí)行走了26.5千米,汽車的速度是多少千米/時(shí)?,速度=,路程時(shí)間,