Worksheet: Addition within 100 Using Bar Models

In this worksheet, we will practice modeling addition situations of adding to and putting together with bar models or part-part-whole diagrams.


There are two buses. One has 46 tourists, and the other has 27 tourists. How many tourists are there in total?


Bassem was counting the coins in his money box. He had 34 quarters and 21 dimes. He wants to know how many coins are in his money box.

Which part-part-whole diagram represents this problem?

  • A
  • B


On Wednesday, 23 boys and 55 girls went to the library. How many children went to the library on Wednesday?

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