题目内容
计算:①10
+(-3
)+(-8
)+(-2
)
②(1
-2
+3
-4
)÷(-
).
| 3 |
| 5 |
| 5 |
| 6 |
| 3 |
| 5 |
| 1 |
| 6 |
②(1
| 4 |
| 5 |
| 5 |
| 6 |
| 7 |
| 10 |
| 8 |
| 15 |
| 1 |
| 30 |
①10
+(-3
)+(-8
)+(-2
),
=10
-8
-3
-2
,
=2-6,
=-4;
②(1
-2
+3
-4
)÷(-
),
=(
-
+
-
)×(-30),
=
×(-30)-
×(-30)+
×(-30)-
×(-30),
=-54+85-111+136,
=221-165,
=56.
| 3 |
| 5 |
| 5 |
| 6 |
| 3 |
| 5 |
| 1 |
| 6 |
=10
| 3 |
| 5 |
| 3 |
| 5 |
| 5 |
| 6 |
| 1 |
| 6 |
=2-6,
=-4;
②(1
| 4 |
| 5 |
| 5 |
| 6 |
| 7 |
| 10 |
| 8 |
| 15 |
| 1 |
| 30 |
=(
| 9 |
| 5 |
| 17 |
| 6 |
| 37 |
| 10 |
| 68 |
| 15 |
=
| 9 |
| 5 |
| 17 |
| 6 |
| 37 |
| 10 |
| 68 |
| 15 |
=-54+85-111+136,
=221-165,
=56.
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