+ – × ÷
- A+B:程度一、程度二
、A+B=N(5-20)
and
drag&drop
- 3-digit(-)
3-digit(-) (regroup)
- step by step (-)
- 3-digit numbers (+)
- 3-digit numbers (+)
- 4-digit numbers (-)
regroup twice
| Toy Theater
1-99
clock
time
- addition-pull
- subtraction-sumo
- math-mine-add-subtract
kayak
- Teacher tools
、Math Games
make a number
|