题目内容
计算
(1)-20+(-14)-(-18)-13
(2)42×(-
)+(-
)÷(-0.25)
(3)-1
×(0.5-
)÷1
(4)(2
-
+
)×(-24)
(5)-1101-[-3×( 2÷3 )2-
÷22].
(1)-20+(-14)-(-18)-13
(2)42×(-
| 2 |
| 3 |
| 3 |
| 4 |
(3)-1
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 9 |
(4)(2
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 4 |
(5)-1101-[-3×( 2÷3 )2-
| 4 |
| 3 |
(1)-20+(-14)-(-18)-13
=-20-14+18-13
=-47+18
=-29;
(2)42×(-
)+(-
)÷(-0.25)
=-28+3
=-25;
(3)-1
×(0.5-
)÷1
=-
×(-
)÷1
=
÷1
=
;
(4)(2
-
+
)×(-24)
=-2
×24+
×24-
×24
=-60+4-6
=-62;
(5)-1101-[-3×( 2÷3 )2-
÷22]
=-1-[-3×
-
÷4]
=-1-[-
-
]
=-1+
=
.
=-20-14+18-13
=-47+18
=-29;
(2)42×(-
| 2 |
| 3 |
| 3 |
| 4 |
=-28+3
=-25;
(3)-1
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 9 |
=-
| 5 |
| 3 |
| 1 |
| 6 |
| 1 |
| 9 |
=
| 5 |
| 18 |
| 1 |
| 9 |
=
| 1 |
| 4 |
(4)(2
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 4 |
=-2
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 4 |
=-60+4-6
=-62;
(5)-1101-[-3×( 2÷3 )2-
| 4 |
| 3 |
=-1-[-3×
| 4 |
| 9 |
| 4 |
| 3 |
=-1-[-
| 4 |
| 3 |
| 1 |
| 3 |
=-1+
| 5 |
| 3 |
=
| 2 |
| 3 |
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