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.

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