Curriculum>Grade 1> Module 2>Topic B: Counting On or Taking from Ten to Solve Result Unknown and Total Unknown Problems

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Students will solve subtraction equations with the strategy of making 10. Options include mentally solving to provide the answer, or first breaking down one element using a number bond to make 10, then subtracting to find the solution

A. Solve subtraction problems taking from 10

B. Subtract single digits from numbers 11-19 to make 10

C. Subtract the digit in the ones place from numbers 11-19 to make 10

D. Find the unknown number in subtraction problems to make 10

E. Solve subtraction problems beginning with a number from 11-15 and crossing 10

F. Use the strategy of making 10 to solve subtraction equations

G. Introduce subtraction across 10 using base-ten blocks

H. Model subtraction across 10 using base-ten blocks and knowledge of number bonds

I. More practice subtracting across 10 with base-ten blocks

J. Use number bonds to break down components of subtraction equations; use two equations to solve

K. Use number bonds to break down components of subtraction equations; use one equation to solve

M. Solve subtraction equations that cross 10

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