问题 解答题
脱式计算,能简算的要简算.
22.9-13.68+12.68
4.7×11-4.7
28.8×6.3-6.3×18.84.8+5.2÷4
5.37-(2.37-1.8)10.01-2.78+1.59.
答案

(1)22.9-13.68+12.68

=22.9-(13.68-12.68)

=22.9-1

=21.9;

(2)4.7×11-4.7

=4.7×(11-1)

=4.7×10

=47;

(3)28.8×6.3-6.3×18.8

=(28.8-18.8)×6.3

=10×6.3

=63;

(4)4.8+5.2÷4

=4.8+1.3

=6.1;

(5)5.37-(2.37-1.8)

=(5.37-2.37)+1.8

=3+1.8

=4.8;

(6)10.01-2.78+1.59

=(10.01+1.59)-2.78

=11.6-2.78

=8.82.

判断题
判断题