根據(jù)6.386÷0.62=10.3直接填空.
6.386÷0.062=________÷0.62=103
63.86÷6.2=________
638.6÷________=10.3.
63.86 10.3 62
分析:根據(jù)商不變性質(zhì):被除數(shù)和除數(shù)同時擴大或縮小相同的倍數(shù)(0除外),商不變;
及商的變化規(guī)律,被除數(shù)不變,除數(shù)數(shù)擴大(或縮。⿴妆叮0除外),則商縮。ɑ驍U大)相同的倍數(shù);除數(shù)不變,被除數(shù)擴大或縮小幾倍(0除外),則商也隨之?dāng)U大(或縮。┫嗤谋稊(shù);據(jù)此解答.
解答:6.386÷0.062,
=(6.386×10)÷(0.062×10),
=63.86÷0.62,
=103;
6.386÷0.62,
=63.86÷6.2,
=10.3;
6.386÷0.62,
=(6.386×100)÷(0.62×100),
=638.6÷62,
=10.3;
故答案為:63.86,10.3,62.
點評:明確據(jù)商不變性質(zhì)及商的變化規(guī)律,是解答此題的關(guān)鍵.