312+496=
147-99=
5.3+2.67=
0.125×18=
10÷0.1=
42-22=
2.4-(1.4-0.58)=
(5.5-1.32)×0=

解:(1)312+496
=312+500-4,
=812-4,
=808;

(2)147-99
=147-100+1,
=47+1,
=48;

(3)5.3+2.67=7.97;

(4)0.125×18
=0.125×(10+8),
=0.125×10+0.125×8,
=1.25+1,
=2.25;

(5)10÷0.1=100;

(6)42-22
=16-4,
=12;

(7)2.4-(1.4-0.58)=
=2.4-1.4+0.58,
=1+0.58,
=1.58;

(8)(5.5-1.32)×0=0.
分析:(1)(2)可根據(jù)湊整法計(jì)算;
(3)根據(jù)小數(shù)加法的計(jì)算法則計(jì)算即可;
(4)可將18拆分為10+8后根據(jù)乘法分配律計(jì)算;
(5)根據(jù)小數(shù)除法的計(jì)算法則計(jì)算即要可;
(6)先算乘方,再算減法;
(7)可根據(jù)一個(gè)數(shù)減兩個(gè)數(shù)的差,等于用這個(gè)數(shù)減去兩數(shù)中的被減數(shù),加上減數(shù)的減法性質(zhì)計(jì)算;
(8)0乘任何數(shù)都得0.
點(diǎn)評(píng):完成此類題目要注意分析題目中數(shù)據(jù)的特點(diǎn),然后運(yùn)用合適的方法計(jì)算.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

312+496=
147-99=
5.3+2.67=
0.125×18=
10÷0.1=
42-22=
2.4-(1.4-0.58)=
(5.5-1.32)×0=

查看答案和解析>>

同步練習(xí)冊(cè)答案