问题
解答题
计算(1)(-2)2-5÷(-
(2)1-(
|
答案
(1)原式=4-5×(-5)-2
=4+25-2
=27;
(2)原式=1-(
-6 12
-4 12
)×(-12)1 12
=1-
×(-12)1 12
=1+1
=2.
计算(1)(-2)2-5÷(-
(2)1-(
|
(1)原式=4-5×(-5)-2
=4+25-2
=27;
(2)原式=1-(
-6 12
-4 12
)×(-12)1 12
=1-
×(-12)1 12
=1+1
=2.