题目内容
计算:
(1)-9×(-11)-96÷(-8);
(2)7-(
+
-
)×24;
(3)-22×7-(-3)×6+|-10|÷2;
(4)-1100-(
-
)÷1
×[(-7)2-(-11)].
(1)-9×(-11)-96÷(-8);
(2)7-(
3 |
8 |
1 |
6 |
3 |
4 |
(3)-22×7-(-3)×6+|-10|÷2;
(4)-1100-(
1 |
6 |
2 |
5 |
3 |
4 |
分析:(1)先算乘除,再算减法;
(2)先用乘法分配律简算,再算加减;
(3)(4)先算乘方,再算乘除,最后算加减.
(2)先用乘法分配律简算,再算加减;
(3)(4)先算乘方,再算乘除,最后算加减.
解答:解:(1)原式=99+12
=111;
(2)原式=7-(
×24+
×24-
×24)
=7-(9+4-18)
=7-(-5)
=7+5
=12;
(3)原式=-4×7-(-18)+10÷2
=-28+18+54
=-5;
(4)原式=-1-(-
)×
×[49+11]
=-1+
×
×60
=1+8
=9.
=111;
(2)原式=7-(
3 |
8 |
1 |
6 |
3 |
4 |
=7-(9+4-18)
=7-(-5)
=7+5
=12;
(3)原式=-4×7-(-18)+10÷2
=-28+18+54
=-5;
(4)原式=-1-(-
7 |
30 |
4 |
7 |
=-1+
7 |
30 |
4 |
7 |
=1+8
=9.
点评:此题考查有理数的混合运算,抓住运算顺序,正确按运算顺序计算,注意计算结果的符号.
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