问题
解答题
计算 (1)(-38)+52+118+(-62) (2)(-3
(3)|-
(4)-22÷
|
答案
(1)(-38)+52+118+(-62)
=(-38-62)+(52+118)
=-100+170
=70;
(2)(-3
)-(-22 3
)-(-13 4
)-(+1.75)2 3
=(-3
+12 3
)+(2.75-1.75)2 3
=-1+1
=0;
(3)|-
|÷(7 9
-2 3
)-1 5
×(-4)2 1 3
=
÷7 9
-7 15
×161 3
=
-5 3 16 3
=-3
;2 3
(4)-22÷
-[22-(1-4 3
×1 2
)]×121 3
=-4÷
-[4-(1-4 3
)]×121 6
=-3-[4-
]×125 6
=-3-
×1219 6
=-3-38
=-41.