① × = ② ﹣ = ③ ÷6= ④50×50%= ⑤9π﹣8π=
⑥0.75× = ⑦1010%= ⑧0.52+0.75= ⑨ × ÷ × = ⑩ × × =
正方形的个数/个 |
1 |
2 |
3 |
4 |
5 |
… |
小棒根数/根 |
4 |
7 |
10 |
|
|
… |