问题
解答题
计算 (1)-16+(-29)-(-7)-(+11) (2)(-81)÷
(3)(
(4)-14÷(-5)2×(-
|
答案
(1)原式=-16-29+7-11=-56+7=-49;
(2)原式=-81×
×4 9
×(-4 9
)=1;1 16
(3)原式=-12+2-25=-35;
(4)原式=-1÷25×(-
)+0.2=5 3
+1 15
=1 5
.4 15
计算 (1)-16+(-29)-(-7)-(+11) (2)(-81)÷
(3)(
(4)-14÷(-5)2×(-
|
(1)原式=-16-29+7-11=-56+7=-49;
(2)原式=-81×
×4 9
×(-4 9
)=1;1 16
(3)原式=-12+2-25=-35;
(4)原式=-1÷25×(-
)+0.2=5 3
+1 15
=1 5
.4 15