Lesson Worksheet: Adding by Renaming Mathematics

In this worksheet, we will practice adding by using the fact that one ten equals ten ones and deciding whether we need to rename the result or not.


Make a ten to find 35+5.


23 is modeled as shown.

By using the place value model to add 9 to 23, we will not be able to add all the beads in the ones column, so we will regroup the ones.

Which of these models shows the regrouping?

  • A
  • B
  • C

Fill in the blank: 23+9=.


Khalid has 69 marbles. His friend gives him 4 more. How many marbles does he have now?


Write the addition equation that matches the model.

  • A25+7=30
  • B20+7=32
  • C25+7=95
  • D25+7=32


Calculate 35+5.

Tip: Use the place value blocks if you need to.


Mentally calculate 7+25.


Using the base ten blocks, calculate 44+7.


Which model represents 36+6?

  • A
  • B
  • C
  • D


Calculate 38+5.


Omar is using base ten blocks to help him add 9 to 34.

He adds the ones first. There are 13 ones.

Pick the model that shows what he should do.

  • A
  • B
  • C

Find the sum.

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