问题 解答题

简便计算

(1)43×29-19×43

(2)180.9-23.07-56.93

(3)32×25×125

(4)0.12+5.34+19.88+3.66

(5)276+276×99.

答案

(1)43×29-19×43

=(29-19)×43

=10×43

=430;

(2)180.9-23.07-56.93

=180.9-(23.07+56.93)

=180.9-80

=100.9;

(3)32×25×125

=8×4×25×125

=(8×125)×(4×25)

=1000×100

=100000;

(4)276+276×99

=(1+99)×276

=100×276

=27600.

单项选择题 A1/A2型题
单项选择题