问题 解答题

计算下面各题.(能简算的要简算)

(1)3.46+2.37+0.54+0.63

(2)50.8-(8.6+9.6×4)

(3)25-4.2×1.4+1.08

(4)8-1.26×1.5+93.89.

答案

(1)3.46+2.37+0.54+0.63

=(3.46+0.54)+(2.37+0.63)

=4+3

=7;

(2)50.8-(8.6+9.6×4)

=50.8-(8.6+38.4)

=50.8-47

=3.8;

(3)25-4.2×1.4+1.08

=25-5.88+1.08

=25-(5.88-1.08)

=25-4.8

=20.2;

(4)8-1.26×1.5+93.89

=8-1.89+93.89

=8+(93.89-1.89)

=8+92

=100.

单项选择题
单项选择题