4比5少________%??????????5比4多________%
比35米少是________米?????20吨比________吨少20%
网友回答
20 25 7 25
解析分析:①4比5少,把5看作单位1,可列算式:(5-4)÷5求解;
②5比4多,把4看作单位1,可列算式:(5-4)÷4求解;
③比35米少是,把35米看作单位1,可列算式:35×求解;
④是求单位1的量,用除法,可列算式20÷(1-20%)求解.
解答:(5-4)÷5×100%
=1÷5×100%
=20%;??????????
(5-4)÷4×100%
=1÷4×100%
=25%;?????????
35×=7(米);????
20÷(1-20%)
=20÷0.8
=25(吨).
故