This illustrated pamphlet describes the operation of manual and electrically operated versions of the Underwood Sundstrand printing adding machine. Addition, subtraction, and multiplication by ...

This video addresses Common Core Grade 2 Standard Operations & Algebraic Thinking: Represent and solve problems involving addition and subtraction. 03/01/2017 | Rating NR ...

Adding and subtracting fractions When adding or subtracting fractions, you need to look at the denominator. If the denominator is the same, then you can just add or subtract the numerator.

Chennai: The Madras Dyslexia Association (MDA), founded by an IIT Madras alumnus, has developed a remedial toolkit for ...

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