Duck and Frog Pond Problems

Some ducks were in a pond. 4 baby ducks joined them. Now, there are 6 ducks in the pond. How many ducks were in the pond at first?

Some frogs were in a pond. Three jumped out, and now there are 5 frogs in the pond. How many frogs were in the pond at first?

Each of the solutions is missing numbers or parts of the drawing. Fix each one so it is accurate and complete. 13 + 8 = 21

Circle the student work that correctly solves the addition problem. 16 + 5

• Incorrect student work

• Incorrect student work

• Correct student work

Fix the work that was incorrect by making new work in the space below with the matching number sentence.

Circle the student work that correctly solves the addition problem. 13 + 20

• [Diagram of student work]

• [Diagram of student work]

• [Diagram of student work]

Fix the work that was incorrect by making a new drawing in the space below with the matching number sentence.

Solve using quick tens, the arrow way, or number bonds. 17 + 5 = _____

Share with your partner. Discuss why you chose to solve the way you did.

Circle the work that correctly solves the addition problem: 17 + 9.

• Strategy a

• Strategy b

• Strategy c