题目内容
(2-3)÷
-
计算:a-b+
计算
(1)-a2x4y5÷(axy2)2÷(ab)-4;
(2)-23-(-)-2+[2-1×()-3×(-)0]2.
化简或计算
||-|4.2|+|-|
2-2÷×3
用计算器计算:
(-11)3×(-23)2×322(精确到亿)
用简便方法计算:
×24.3+0.25×80.6-4.9×.
(2x-3y)2-(4y-3x)(3x+4y)