Mathematics·Multiplication & Division·procedural
Multiplying by Tens
Multiply one-digit whole numbers by multiples of 10 in the range 10–90 using strategies based on place value and properties of operations
Suggested ages 8–9
Learning journey
Your child is building fluency with multiplication and division — memorizing times tables up to 12×12, understanding the relationship between multiplication and division, and solving word problems involving equal groups and arrays.
Evidence of understanding
- Calculate 7 × 30 = 210 by reasoning 7 × 3 tens = 21 tens = 210
- Explain why multiplying by a multiple of 10 adds a zero to the product
- Use this skill to estimate products of larger numbers
Assessment prompt
Can Multiplying by Tens quickly work out '7 × 40' or '6 × 80' by first doing the single-digit multiplication and then placing the zero — getting 280 and 480?
Standards alignment
3.NBT.3US · ccss-math
Multiply one-digit whole numbers by multiples of 10
Common Core State Standards for Mathematics · 3