Math3-5
Multiplying Decimals by Whole Numbers for Grade 5
By Melaney J.
A classroom practice set and at-home homework extension that teaches 5th graders to multiply a decimal by a whole number using place value to position the decimal point. Students work through a worked example (4 × 2.35) and then check their answers with estimation, building decimal multiplication and number sense skills.
Customize for your classroom
Teacher Guide & Tips
- Use the in-class worksheet as a 30-40 minute guided practice block: model the three-step worked example first, then have students complete problems with a partner before independent work.
- Discussion question: Why does 4 × 2.35 have two decimal places in the answer even though we multiplied by a whole number? Ask students to explain the connection to place value.
- Scaffold for struggling readers: provide a place value chart or grid paper so students can line up digits, and have them estimate with rounded numbers (2.35 is close to 2) before calculating.
- Extension for advanced students: ask them to create their own decimal-by-whole-number problems and explain how the estimate confirms the reasonableness of each product.
- The at-home homework extension should take about 20 minutes and reinforces the day's strategy with a few new problems and an estimation check for each answer.
Math3-5
Multiplying Decimals by Whole Numbers for Grade 5
By Melaney J.
A classroom practice set and at-home homework extension that teaches 5th graders to multiply a decimal by a whole number using place value to position the decimal point. Students work through a worked example (4 × 2.35) and then check their answers with estimation, building decimal multiplication and number sense skills.
Customize for your classroom
Teacher Guide & Tips
- Use the in-class worksheet as a 30-40 minute guided practice block: model the three-step worked example first, then have students complete problems with a partner before independent work.
- Discussion question: Why does 4 × 2.35 have two decimal places in the answer even though we multiplied by a whole number? Ask students to explain the connection to place value.
- Scaffold for struggling readers: provide a place value chart or grid paper so students can line up digits, and have them estimate with rounded numbers (2.35 is close to 2) before calculating.
- Extension for advanced students: ask them to create their own decimal-by-whole-number problems and explain how the estimate confirms the reasonableness of each product.
- The at-home homework extension should take about 20 minutes and reinforces the day's strategy with a few new problems and an estimation check for each answer.