Using Place Value Disks to Model Addition & Subtraction

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Review place value addition and subtraction with 3rd and 4th grade students. Use place value blocks or place value disks to review addition and subtraction. Free Place Value resources for guided math groups.It’s the beginning of third grade and you’re working on addition and subtraction word problems. Everything seems to be going well, and you feel confident moving on to multiplication and division.

The problem?

Your students are given an addition and subtraction problem to solve during their morning work and several students get the incorrect answer. Why? Did they make a careless mistake?

You may find yourself saying: “You don’t have any hundreds, so you have to regroup.” or “You forgot to carry the one.” Yet, those same students keep making mistakes throughout the year. This is because they don’t have a strong understanding of place value.

We must make the time to slow down and help students build on their place value understanding.

In the primary grades, students learned that 10 ones can be viewed as a ten and 10 tens can be viewed as a hundred. Now they need to take this understanding and connect it to addition and subtraction. Place value blocks or place value disks are wonderful tools to help students make those connections. Below are some examples.


EXAMPLE 1: 157 + 46

Addition and Subtraction using Place Value models. Remediation lesson for math groups. Using place value disks to add and subtract. Addition and Subtraction using Place Value models. Remediation lesson for math groups. Using place value disks to add and subtract.

  • Step 1: Use place value disks to model 157 and 46.
  • Step 2: ‘Combine’ the 10 ones and create 1 ten.

Addition and Subtraction using Place Value models. Remediation lesson for math groups. Using place value disks to add and subtract. Addition and Subtraction using Place Value models. Remediation lesson for math groups. Using place value disks to add and subtract.

  • Step 3: ‘Combine’ the 10 tens and create 1 hundred.
  • Step 4: Write down the sum.

EXAMPLE 2: 417 – 233

Review place value addition and subtraction with 3rd and 4th grade students. Use place value blocks or place value disks to review addition and subtraction. Free Place Value resources for guided math groups. Review place value addition and subtraction with 3rd and 4th grade students. Use place value blocks or place value disks to review addition and subtraction. Free Place Value resources for guided math groups.

  • Step 1: Use place value disks to model 417.
  • Step 2: Take away 3 ones.

Review place value addition and subtraction with 3rd and 4th grade students. Use place value blocks or place value disks to review addition and subtraction. Free Place Value resources for guided math groups. Review place value addition and subtraction with 3rd and 4th grade students. Use place value blocks or place value disks to review addition and subtraction. Free Place Value resources for guided math groups.

  • Step 3: Break apart 1 hundred into 10 tens.
  • Step 4: Take away 3 tens. Take away 2 hundreds. Write the difference.

BASE 10 BLOCKS

If your students aren’t ready for place value disks, then you must download this free resource. Use these large cards to model addition and subtraction.

Review place value addition and subtraction with 3rd and 4th grade students. Use base ten blocks or place value disks to review addition and subtraction. Free Place Value resources for guided math groups.

I’ve also included a copy of the place value sheet pictured below.

Review place value addition and subtraction with 3rd and 4th grade students. Use base ten blocks or place value disks to review addition and subtraction. Free Place Value resources for guided math groups.


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SHOP ADDITION & SUBTRACTION RESOURCES


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Mrs. Santillana

Mrs. Santillana

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