Lesson 1-9 U. S. Traditional Subtraction Overview: Students are introduced to U.S. Traditional Subtraction Vocabulary: counting up, trade-first subtraction, U.S. Traditional subtraction, regroup

Math Message Caleb had $90. He spent $37 on books. How much money does he have left? 235 - 159

Strategy 1 – Counting Up

Strategy 2 – Trade First Subtraction 235 - 159 = Always check your answers.

Strategy 2 – Trade First Subtraction 235 - 159 = Always check your answers.

Strategy 2 – Trade First Subtraction 235 - 159 = Always check your answers.

Practice Estimates for a moment

U.S. Traditional Subtraction

U.S. Traditional Subtraction

U.S. Traditional Subtraction

U.S. Traditional Subtraction – another example

U.S. Traditional Subtraction – another example

U.S. Traditional Subtraction – another example

Practice Page 21 Page 22 Page 23

Exit Ticket 836 – 487 =