阅读下列材料,并回答问题:∵11×2=1-12,12×3=12-13,13×4=13-14,14×5=14-15,…∵11×3=12(1-13),13×5=12(13-15),15×7=12(15-17),…(1)从计算结果中找出规律,利用规律性计算-数学
1 |
3 |
1 |
5 |
1 |
2 |
1 |
5 |
1 |
7 |
1 |
2 |
1 |
99 |
1 |
101 |
=
1 |
2 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
5 |
1 |
7 |
1 |
99 |
1 |
101 |
=
1 |
2 |
1 |
101 |
=
1 |
2 |
100 |
101 |
=
50 |
101 |
(3)
1 |
1×4 |
1 |
4×7 |
1 |
7×10 |