Adding and Subtracting Large Numbers

In 4th grade, you’ll work with bigger numbers than ever before! Addition and subtraction can be done with numbers up to the millions. When you add or subtract, always line up the digits according to their place value columns: ones, tens, hundreds, and so on.

Multiplying and Dividing

Multiplication is repeated addition, and division is splitting things into equal groups. You’ll multiply up to four-digit numbers by one-digit numbers, and divide larger numbers by one-digit numbers. Learning your multiplication tables makes this much easier!

Real-World Connections

These skills help you solve problems like finding out how much money you have after spending some, or how many seats are needed for a school event.

Tips

• Always check your math by estimating.
• Use math strategies like breaking numbers apart (decomposing) to make calculations easier.