计算:(1)(-3)×(-9)+8×(-5);(2)-22+(-2)3×5-(-8)÷(-2)2.
题型:解答题难度:一般来源:不详
计算: (1)(-3)×(-9)+8×(-5); (2)-22+(-2)3×5-(-8)÷(-2)2. |
答案
(1)原式=27-40=-13; (2)原式=-4-8×5+8÷4 =-4-40+2 =-42 |
举一反三
(1)+(-); (2)(-72)-25; (3)-+1-2.5+4-5; (4)(+--)×(-24); (5)[1-|-|]÷[3-(-3)]. |
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