题目内容
1964×(
-
)+43×(
-
)-2007×(
+
)+3= .
| 1 |
| 43 |
| 1 |
| 2007 |
| 1 |
| 1964 |
| 1 |
| 2007 |
| 1 |
| 1964 |
| 1 |
| 43 |
分析:先把每一项运用乘法分配律计算,然后运用加法交换与结合律简算.
解答:解:1964×(
-
)+43×(
-
)-2007×(
+
)+3
=
-
+
-
-
-
+3
=(
-
)-(
+
)+(
-
)+3
=-1-1-1+3
=-3+3
=0
故答案为:0.
| 1 |
| 43 |
| 1 |
| 2007 |
| 1 |
| 1964 |
| 1 |
| 2007 |
| 1 |
| 1964 |
| 1 |
| 43 |
=
| 1964 |
| 43 |
| 1964 |
| 2007 |
| 43 |
| 1964 |
| 43 |
| 2007 |
| 2007 |
| 1964 |
| 2007 |
| 43 |
=(
| 1964 |
| 43 |
| 2007 |
| 43 |
| 1964 |
| 2007 |
| 43 |
| 2007 |
| 43 |
| 1964 |
| 2007 |
| 1964 |
=-1-1-1+3
=-3+3
=0
故答案为:0.
点评:仔细观察题目中数字构成的特点和规律,运用运算定律或运算技巧,进行简便计算.
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