12 - 5 = 7 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.

Learn activities for first grade math to prepare for school. Teach your children 1st grade math skills like counting, adding and using number words.

A learning/teaching approach used base-ten blocks to embody the English named-value system of number words and digit cards to embody the positional base-ten system of numeration. Steps in addition and ...

Students learn characteristics of a nonfiction text & to add and subtract using 10 frames.

Inside a giant computer created before the age of mathemagicians, Olivia and Hassan are faced with a multi-step problem to reach the labyrinth’s next stage.

Learn activities for second grade math to prepare for school. Teach your children 2nd grade math skills like addition and subtraction.

Ellis showed a subtraction problem, performed both using the traditional regrouping, or borrow-and-carry, algorithm and using an example from the common core. Here’s a screenshot of the two methods.

Korean children's ability to solve addition problems with sums of 10, single-digit addition problems with sums between 10 and 18, and single-digit subtraction problems with minuends between 10 and 18 ...