Composing Tens with Manipulatives

Examples and solutions to help Grade 2 students learn how to use manipulatives to represent additions with two compositions.

Common Core Standards: 2.NBT.6, 2.NBT.7, 2.NBT.8, 2.NBT.9

New York State Common Core Math Grade 2, Module 4, Lesson 18

Worksheets for Grade 2, Module 4, Lesson 18

NYS Math Grade 2, Module 4, Lesson 18

Concept Development
Problem 1: 40 + 70
Problem 2: 49 + 73
Problem 3: 136 + 64

Application Problem
Hailey and Gio solve 56 + 85. Gio says the answer is 131. Hailey says the answer is 141. Explain whose answer is correct using numbers, pictures, or words.

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Lesson 18 Homework

1. Solve using your place value chart and number disks.
   a. 20 + 90 = ________ 60 + 70 = _________
   b. 29 + 93 = ________ 69 + 72 = _________
   c. 45 + 86 = ________ 46 + 96 = _________
   d. 47 + 115 = ________ 47 + 95 = _________
   e. 28 + 72 = ________ 128 + 72 = _________
2. Circle the statements that are true as you solve each problem using place value disks.
3. Solve the problem using your number disks and fill in the missing total. Then, write an addition sentence that relates to the number bonds.
4. Solve using your place value chart and place value disks.
   a. 45 + 55 = ________
   b. 78 + 33 = ________
   c. 37 + 84 = ________

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