有理数的混合运算
计算:
(1) (2)
(3) (4)
(5) -6÷(-3×2) (6) 17-8÷(-2)+4×(-3)
(7) 32-50÷(-2)2×(+)-1 (8)
(9) –13-[1-(1-×43)] (10) (-8÷23)-(-8÷2)3
课堂练习
计算:
1. –55+7+99-87 2.
3. (-5) ×(-2)2 4. -32×(-3)2
5. -32÷2÷2 6. 20-5÷(-15)
7. 8. (-12) ×5+(-1) ×52 - 12×5+(-1×5)2
9. (-2)2-(-52) ×(-1)5-87÷(-3) ×(-1)4 10. –14-(1-) ××[2-(-3)2]
11. (-1)8- (1+2-3)×(-24) 12.
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