问题 解答题

脱式计算,能简算的要简算.

(125+7)×8=______;

3.27+6.4+2.73+4.6=______;

25×44=______;

6.45-0.58-1.42=______.

答案

(1)(125+7)×8,

=125×8+7×8,

=1000+56,

=1056;

(2)3.27+6.4+2.73+4.6,

=(3.27+2.73)+(6.4+4.6),

=6+11,

=17;

(3)25×44,

=25×4×11,

=100×11,

=1100;

(4)6.45-0.58-1.42,

=6.45-(0.58+1.42),

=6.45-2,

=4.45.

单项选择题 A1/A2型题
单项选择题