问题
解答题
计算 (1)2.5+(-2)÷
(2)-14÷[-22+(-
|
答案
(1)原式=2.5+2×
×5 2
-3.51 5
=2.5+1-3.5
=0;
(2)原式=-14÷[-4+
×(-27)]4 9
=-14÷(-4-12)
=-14÷(-16)
=
.7 8
计算 (1)2.5+(-2)÷
(2)-14÷[-22+(-
|
(1)原式=2.5+2×
×5 2
-3.51 5
=2.5+1-3.5
=0;
(2)原式=-14÷[-4+
×(-27)]4 9
=-14÷(-4-12)
=-14÷(-16)
=
.7 8