问题 解答题

用简便方法计算.

3.7×4.5-4.4×3.7

0.25×0.25×4

3.84-1.9+0.16-1.1.

答案

(1)3.7×4.5-4.4×3.7

=3.7×(4.5-4.4)

=3.7×0.1

=0.37;

(2)0.25×0.25×4

=0.25×(0.25×4)

=0.25×1

=0.25;

(3)3.84-1.9+0.16-1.1

=3.84+0.16-(1.9+1.1)

=4-3

=1.

填空题
单项选择题 A3/A4型题