Match fun story problems with the correct addition or subtraction expression.

School-aged children focus on addition and subtraction at first, and then eventually reach multiplication (in the form of skip counting) and division (in the form of equal shares).

Children's solutions to simple addition and subtraction word problems were studied in a 3-year longitudinal study that followed 88 children from Grades 1 through 3. The children were able to solve the ...

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.

And while honeybees can't yet write out Einstein's general theory of relativity, new evidence suggests the clever little pollinators can perform simple addition and subtraction after a few math ...

New Study: You Probably Completely Ignore This Brilliant Problem-Solving Strategy The easiest way to solve tough problems is also the one we usually think of last.

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 ...