问题
解答题
计算题 (1)(+3
(2)(1
(3)(-2)÷[(-
(4)-22×(-
|
答案
(1)原式=(3
-32 3
)+(-22 3
+17 8
)+(-31 8
+55 12
)=-17 12
+23 4
=1 6
;5 12
(2)原式=(1
-24 5
+31 3
-47 10
)×(-30)=8 15
×(-30)-9 5
×(-30)+7 3
×(-30)-37 10
×(-30)=-54+70-111+136=41;68 15
(3)原式=(-2)÷(
×1 4
)×1 8
+48=(-2)×32×3 4
+48=-48+48=0;3 4
(4)原式=-4×(-
)+4+(-27)×1 3
×4 9
=4 9
+4-4 3
=4.4 3