5th Grade · Number & Operations in Base Ten
Multiply Decimals
5.NBT.B.7
Definition
To find the product by multiplying digits as whole numbers, then placing the decimal by counting decimal places.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- 0.4 × 0.3 = 0.12 (1 + 1 = 2 decimal places).
- 1.2 × 0.5 = 0.60.
Key rule
Multiply as whole numbers, then count the total decimal places for the product.
Memory hook
Multiply first, place the decimal last.