问题 解答题
怎样算简便就怎样算.(12%)
17.17-6.8-3.2-6.17
5.4×[(1.3+2.15)÷0.2]8.4÷0.6+8.4÷0.4
16.8×10.110.9-0.9÷0.2+1.81.25×3.2×0.25.
答案

(1)17.17-6.8-3.2-6.17

=(17.17-6.17)-(6.8+3.2),

=11-10,

=1;

(2)5.4×[(1.3+2.15)÷0.2]

=5.4×[3.45÷0.2],

=5.4×17.25,

=93.15;

(3)8.4÷0.6+8.4÷0.4

=14+21

=35;

(4)16.8×10.1

=16.8×10+16.8×0.1,

=168+1.68,

=169.68;

(5)10.9-0.9÷0.2+1.8

=10.9-4.5+1.8,

=8.2;

(6)1.25×3.2×0.25

=(1.25×0.8)×(4×0.25),

=1×1,

=1.

单项选择题
单项选择题 A1/A2型题