1 |
2 |
1 |
3 |
1 |
4 |
1 |
5 |
5 |
6 |
2 |
5 |
2 |
9 |
5 |
11 |
1 |
5 |
1 |
2 |
1 |
3 |
1 |
4 |
1 |
5 |
1 |
2 |
1 |
3 |
1 |
4 |
1 |
5 |
20 |
3 |
20 |
3 |
37 |
3 |
5 |
6 |
2 |
5 |
5 |
6 |
12 |
5 |
5 |
6 |
3 |
5 |
5 |
6 |
2 |
9 |
5 |
11 |
1 |
5 |
5 |
11 |
11 |
5 |
A.一间教室地面的面积 | B.一个操场的面积 |
C.一只铅笔盒盒面的面积 | D.一张课桌面的面积 |
98 |
99 |
A.-52=-25 | B.(-2)÷(-1)×(-3)=6 | C.2xy-3xy=xy | D.-(x-y)=-x-y |
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