Students put all of their addition and subtraction skills together to solve equations.

Addition What is 4 + 5? We can put 4 things in one of the parts and 5 in the other part. By combining the two parts in the whole circle we can find the sum of 4 + 5.

The new theme is Addition and Subtraction, stories of humans becoming more and less and sometimes both with the help of technology.

Under the common core, there are many ways to do subtraction—none of which involve borrowing and carrying.

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 ...

Students put all their addition and subtraction skills together to solve equations.