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Subtracting By Regrouping By: Priscilla Montgomery Rolling Hills Elementary Huntsville, AL

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Subtracting by Regrouping 5 4 5 4 - 2 6 - 2 6

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Place Values Ones 123 19 Tens 57785778 In using place value, read numbers from right to left. The first number is the ones place, the second number is the tens place.

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On no! Can’t Subtract! Look at the bottom number. If your bottom is larger, you need to borrow. 5 4 - 2 6

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We Need to Regroup! On your paper copy the problem. On your paper copy the problem. Look at the top number. Look at the top number. Do I have enough to subtract? NO! Do I have enough to subtract? NO! Scratch me, go next door, scratch Scratch me, go next door, scratch that number, make it smaller, go back to the ones place, rewrite that number and place a 1 on the side. Not on the head, not on the back but on the side. Mash in the bottom number and count up to the top number. The number you stop on is the answer. that number, make it smaller, go back to the ones place, rewrite that number and place a 1 on the side. Not on the head, not on the back but on the side. Mash in the bottom number and count up to the top number. The number you stop on is the answer. Proceed with the tens place. Proceed with the tens place.

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You Try It! 9 3 9 3 - 7 8 - 7 8

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See If You Can Do It Again! 8 2 8 2 - 6 3 - 6 3

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Great—You’re a Pro!

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Subtract Whole Numbers Unit 2 Lesson 5. Objectives Explain and apply standard step-by-step approaches for subtraction. Use an inverse relationship to.

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