Let’s Review - Addition Solve the following addition problems in your spiral notebook using: a place value drawing, the subtotals method and the standard algorithm. 463 2. 1,277 + 555 + 925

Let’s Review – Subtraction Solve the following subtraction problems in your spiral notebook using a place value drawing and the standard algorithm. 749 4. 1,300 - 267 - 856

Part – Part – Whole Problems Discuss the problem below with a partner or small group. Identify what information is unknown in the word problem then use a model to solve. Be prepared to share! Janelle had 16 red beads on a string. She puts 10 blue beads on the string. How many beads are on the string now?

Part – Part – Whole Problems Janelle had 16 red beads on a string. She puts 10 blue beads on the string. How many beads are on the string now? Part Whole

Part – Part – Whole Problem Models Part – Part – Whole (Whole Unknown) Part – Part – Whole (Part Unknown) Part ? ? Part Whole Part ? Whole

Part – Part – Whole Problems Discuss the problem below with a partner or small group. Identify what information is unknown in the word problem then use a model to solve. Be prepared to share! There were 48 fourth graders and parents at a party, 31 of them were children. How many were adults? What type of Part – Part – Whole problem is this?

Relate to Inverse Operations There were 28 boys and 25 girls at a party. How many children were at the party? What operation will you use to solve? ________ Equation: There were 53 children at a party, 28 of them were boys. How many girls were at the party? Can you use another operation to solve?

Part – Part – Whole and Inverse Operations How does understanding inverse operations help you solve part – part – whole problems?

Part – Part – Whole Practice Work with a partner to complete the worksheet for practice.

Part – Part – Whole Challenge Together two DVD’s cost $32. One DVD cost $4 more than the other. How much did each DVD cost?