We can use this model to help us solve problems ... Just like with addition, we can use a part-whole model to help partition larger numbers to make them easier to deal with in subtraction problems.

Here you will find a video about addition and subtraction ... how to use written methods to solve large equations. Using addition and subtraction in multi-step problems This animated film from ...

The competition challenged young mathematicians with a series of addition, subtraction, and word problems. After an intense final round, two students emerged as champions, taking […] ...