问题 解答题

脱式计算

1.95+0.65+2.15×1.4  

(42.3-1.5+0.06)×0.66.

答案

(1)1.95+0.65+2.15×1.4,

=1.95+0.65+3.01,

=2.6+3.01,

=5.61;

(2)(42.3-1.5+0.06)×0.66,

=(40.8+0.06)×0.66,

=40.86×0.66,

=26.9676.

单项选择题
单项选择题