题目内容
计算下列各题:①-10+8÷(-2)2-(-4)×(-3);
②(2
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 8 |
| 1 |
| 8 |
③3×(-1)10+(-22)×|(-2)3|÷4÷2-|(-3)2|÷(-3)2×(-1)11;
④43-{(-3)4-[(-1)÷2.5+2
| 1 |
| 4 |
| 8 |
| 15 |
| 8 |
| 15 |
⑤
| 2 |
| 5 |
| 2 |
| 5 |
| 8 |
| 21 |
| 3 |
| 4 |
| 1 |
| 2 |
分析:本题属于有理数的混合运算式子,运用有理数的混合运算规则求值即可.
解答:解:(1)原式=-10+8÷4-12
=-10+2-12
=-20.
(2)原式=(
-
-
)×(-
)
=(-
)×(-
)
=3.
(3)原式=3+(-4)×8÷4÷2-9÷9×(-1)
=3-4+1
=0.
(4)原式=64-{81-[-
+
×(-4)]÷(-3)}
=64-{81-3
}
=64-77
=-13
.
(5)原式=
×(-
)-
×(-
)-
×
×
=-
+
-
=
.
=-10+2-12
=-20.
(2)原式=(
| 9 |
| 4 |
| 9 |
| 2 |
| 9 |
| 8 |
| 8 |
| 9 |
=(-
| 27 |
| 8 |
| 8 |
| 9 |
=3.
(3)原式=3+(-4)×8÷4÷2-9÷9×(-1)
=3-4+1
=0.
(4)原式=64-{81-[-
| 2 |
| 5 |
| 9 |
| 4 |
=64-{81-3
| 2 |
| 15 |
=64-77
| 13 |
| 15 |
=-13
| 13 |
| 15 |
(5)原式=
| 2 |
| 5 |
| 5 |
| 12 |
| 8 |
| 21 |
| 7 |
| 4 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
=-
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 8 |
=
| 3 |
| 8 |
点评:本题主要考查有理数的混合运算,关键在于熟练运用有理数的混合运算规则,是常见的考点.
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