5th Grade · Number & Operations in Base Ten
Multiply Whole Numbers
5.NBT.B.5
Definition
To find the product of multi-digit numbers using place value and partial products.
Examples
- 24 x 13 = 312, using the standard algorithm or an area model.
- The area model breaks 24 x 13 into 20x10, 20x3, 4x10, and 4x3, then adds the parts.
Key rule
Multiply multi-digit numbers using the standard algorithm or an area model, then add partial products.
Memory hook
Break it into parts, then add the parts back together.