(1)(-8)-47+18-(-27)
(2)(-3)×(-9)-8×(-5)
(3)
(4)计算:-5(x2-3)-2(3x2+5)
(5)化简并求值:4y2-(x2+y2)+(x2-4y2),其中x=-28,y=18
计算题.
(1)计算:(﹣4)2×[(﹣
)+(﹣
)]
(2)计算:(﹣2)3﹣(1﹣0.5)×
×[2﹣(﹣4)2].
计算:
(1)(
+
-2.75)×(-24);
(2)-32+(-2-5)÷7+|-
|×(-2)2.
计算:
(1)12﹣(﹣15)+(﹣23)
(2)3×

(3)﹣23÷8﹣
×(﹣2)2
(4)﹣6×
.
试题篮
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