问题
解答题
计算: (1)23-6×(-3)+2×(-4)-|-5|; (2)-12-[1
|
答案
(1)23-6×(-3)+2×(-4)-|-5|
=23+18-8-5
=43-13
=30;
;
(2)-12-[1
+(-12)÷6]2×(-3 7
)3.3 4
=-1-[1
-2]2×(-3 7
).27 64
=-1-[-
]2×(-4 7
).27 64
═-1-
×(-16 49
).27 64
-1+27 196
=169 196