6-Let’s Estimate
On a daily basis, we do not have to make exact calculations very ...
5-Let’s Derive Facts
Deducing facts based on others we are already aware of, is a crucial ...
4-Let’s Subtract by Breaking Down
The breaking down strategy is a key one for written calculation.
Let’s see ...
3-Let’s Add by Breaking Down
The breaking down strategy is a key one for written calculation.
Let’s see ...
2-Let’s Subtract by Jumping
The jumping strategy is a key one for mental calculation.
Let’s see how ...
1-Let’s Add by Jumping
The jumping strategy is a key one for mental calculation.
Let’s see how ...