養(yǎng)禽場養(yǎng)雞10萬只,鴨8萬只.雞的只數(shù)是鴨的________%,雞的只數(shù)比鴨多________%;鴨的只數(shù)是雞的________%,鴨的只數(shù)比雞少________%.
125 25 80 20
分析:①雞的只數(shù)是鴨的百分之幾,用雞的只數(shù)除以鴨的只數(shù)即可.
②雞的只數(shù)比鴨多百分之幾,雞比鴨多的只數(shù)除以鴨的只數(shù)即可.
③鴨的只數(shù)是雞的百分之幾,鴨的只數(shù)除以雞的只數(shù)即可.
④鴨的只數(shù)比雞少百分之幾,用鴨比雞少的只數(shù)除以雞的只數(shù)即可.
解答:①雞的只數(shù)是鴨的百分之幾:
10÷8=125%;
②雞的只數(shù)比鴨多百分之幾:
(10-8)÷8,
=2÷8,
=25%;
③鴨的只數(shù)是雞的百分之幾:
8÷10=80%;
④鴨的只數(shù)比雞少百分之幾:
(10-8)÷10,
=2÷10,
=20%;
故答案為:125%,25%,80%,20%.
點評:本題根據(jù)題意運用除法進行解答,注意是誰比誰多,誰比誰少,再列式解答即可.