问题
解答题
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=
答案
(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.