 # Subtract 7, 8, and 9 from Teen Numbers

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Lesson Plans and Worksheets for Grade 1
Lesson Plans and Worksheets for all Grades

Eureka Math/EngageNY grade 1 module 2 lesson 20 Worksheets

New York State Common Core Math Grade 1 Module 2, Lesson 20
Eureka Math grade 1 module 2 lesson 20 Worksheets (pdf)

Worksheets, solutions, and videos to help Grade 1 students learn how to subtract 7, 8, and 9 from teen numbers.

Common Core Standards: 1.OA.1, 1.OA.3, 1.OA.4, 1.OA.6, 1.OA.5, 1.OA.7

Lesson 20 Concept Development

Learning goal: I can use addition to help solve a subtraction number sentence.

Lesson 20 Problem Set

Complete the subtraction sentences to make them true.
(a) 12 - 9 = ___
(b) 13- 9 = ___
(c) 14 - 9 = ___ Lesson 20 Homework

Complete the number sentences to make them true.
14. Read the math story. Use a drawing or a number bond to show how you know who is right.
a. Elsie says that the expressions 17 - 8 and 18 - 9 are equal. John says they are not equal. Who is right?
b. John says that the expressions 11 – 8 and 12 – 8 are not equal. Elsie says they are. Who is right?
c. Elsie says to solve 17 – 9, I can take one from 17 and give it to 9 to make 10. So 17 – 9 is equal to 16 – 10. John thinks Elsie made a mistake. Who is correct?
d. John and Elsie are trying to find several subtraction number sentences that start with numbers larger than 10 and always have an answer of 7. Help them figure out number sentences. They started the first one.

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