问题
解答题
计算 (1)|-2|-(-2.5)-|1-4| (2)(-
(3)-12-[1
|
答案
(1)1)|-2|-(-2.5)-|1-4|=2+2.5-3=1.5;
(2)(-
+1 2
-1 6
+3 8
)×(-24)=-5 12
×(-24)+1 2
×(-24)-1 6
×(-24)+3 8
×(-24)=12-4+9-10=7;5 12
(3)-12-[1
+(-12)÷6]2×(-3 7
)3=-1-[11 4
-2]2×(-3 7
)3=-1-1 4
×(-16 49
)=-1 64
.195 196