问题
解答题
计算下列各题 (1)-1+
(2)(-2)÷
(3)-32×2-3×(-2)2 (4)[50-(
|
答案
(1)原式=-
-1 2
+1 4
=-1 8
;5 8
(2)原式=-6×(-3)=18;
(3)原式=-9×2-3×4=-18-12=-30;
(4)原式=[50-(
-7 9
+11 12
)×36]÷49=(50-28+33-6)÷49=49÷49=1.1 6
计算下列各题 (1)-1+
(2)(-2)÷
(3)-32×2-3×(-2)2 (4)[50-(
|
(1)原式=-
-1 2
+1 4
=-1 8
;5 8
(2)原式=-6×(-3)=18;
(3)原式=-9×2-3×4=-18-12=-30;
(4)原式=[50-(
-7 9
+11 12
)×36]÷49=(50-28+33-6)÷49=49÷49=1.1 6