# Add and Subtract Multiples of 10 within 100

Videos solutions to help Grade 2 students learn how to add and subtract multiples of 10 and some ones within 100.

Common Core Standards: 2.NBT.2, 2.NBT.1, 2.NBT.3, 2.MD.8

### NYS Math Grade 2, Module 4, Lesson 3

Lesson 3 Homework
1. Solve using the arrow way.
56 + 40 = ____
56 + 41 = ____
56 + 39 = ____

Solve using the arrow way, number bonds, or mental math.
3. Marcy had \$84 in the bank. She took \$39 out of her account. How much does she have in her account now?
Lesson 3 Homework
1. Solve using the arrow way.
68 - 40 = ____
68 - 41 = ____
69 - 39 = ____

### NYS Math Module 4 Grade 2 Lesson 4

Lesson 4 Problem Set
1. Solve. Draw and label a tape diagram to subtract tens.
Write the new number sentence.
a. 23 - 9 = 24 – 10 = ______
b. 32 – 19
c. 50 – 29 Lesson 4 Homework
1. Solve by drawing or completing a tape diagram to subtract 10, 20, 30, 40, etc.
a. 17 – 9 = 18 – 10 = ______
c. 60 – 29
d. 56 – 38

2. Solve by drawing a number bond to add 10, 20, 30, 40, etc.
a. 28 + 43 = 30 + 41 = _____
b. 49 + 26 = _________ = _____

3. Use a number bond or tape diagram to solve.