MathematicsMultiplication & DivisionAges 8–9
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
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Teaching Table · Plan outline
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Check 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
“Can your child quickly work out '7 × 40' or '6 × 80' by first doing the single-digit multiplication and then placing the zero — getting 280 and 480?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Multiplication & Division
- Age range
- Ages 8–9
Standards
ccss-math:3.NBT.3