Subtract 7, 8, and 9 from Teen Numbers
Videos to help Grade 1 students learn how to subtract 7, 8, and 9 from teen numbers.
Common Core Standards: 1.OA.1,
Plans and Worksheets for Grade 1
Plans and Worksheets for all Grades
Lessons for Grade 1
Common Core For Grade 1
New York State Common Core Math Module 2, Grade 1, Lesson 20
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
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?
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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