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Subtraction with Regrouping
3rd
Grade Indiana Math Standard 3.2.1
7 2
Name
6 4 8 3 3 1 6 0 4 2
2 5 7 3 8 2 7 5 2 1 9 3
5 0 7 1 4 3 9 1 2 0 5 2
3 3 6 2 9 4 3 2 4 4 7 0
Directions: For each ...
7 2
3 4
You can’t take
4 from 2
so you must
regroup the 72.
7 2
Let’s just think
about the 72
for a minute.
Remember the
place value
columns.
tens
ones
Put 72 in expanded form: 70 + ...
Now let’s
get back to
the original
problem.
7 2
3 4
You can’t take
4 from 2
so you must
regroup the 72.
6

Borrow 1 ten
fr...
4 5
You can’t take
5 from 4
so you must
regroup the 64.
6
5

Borrow 1 ten
from the 6.
414
Give the 1 ten to
the 4 to make ...
313
Give the 1 ten to
the 3 to make 13.
8
7

Borrow 1 ten
from the 8.
2 6
You can’t take
6 from 3
so you must
regroup the ...
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Subtracting with Regrouping.ppt

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A fun math activity for dice. Roll the dice to see what number you are subtracting. Includes thorough explanation of regrouping. Worksheet also included.

Published in: Education, Technology
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Subtracting with Regrouping.ppt

  1. 1. Subtraction with Regrouping 3rd Grade Indiana Math Standard 3.2.1
  2. 2. 7 2 Name 6 4 8 3 3 1 6 0 4 2 2 5 7 3 8 2 7 5 2 1 9 3 5 0 7 1 4 3 9 1 2 0 5 2 3 3 6 2 9 4 3 2 4 4 7 0 Directions: For each problem, roll two dice. Write each number you roll in a box then solve.
  3. 3. 7 2 3 4 You can’t take 4 from 2 so you must regroup the 72.
  4. 4. 7 2 Let’s just think about the 72 for a minute. Remember the place value columns. tens ones Put 72 in expanded form: 70 + 2 You can borrow 10 from the 70 and give it to the 2 and still have 72. 7 0 6 0borrow 10 1 22 give 10 7 27 2 + +
  5. 5. Now let’s get back to the original problem. 7 2 3 4 You can’t take 4 from 2 so you must regroup the 72. 6 Borrow 1 ten from the 7. 12 Give the 1 ten to the 2 to make 12. Now subtract. 3 8 Let’s read the completed problem: 72 – 34 = 38 Remember you’re actually taking 10 from 70
  6. 6. 4 5 You can’t take 5 from 4 so you must regroup the 64. 6 5 Borrow 1 ten from the 6. 414 Give the 1 ten to the 4 to make 14. Now subtract. 1 9 Let’s read the completed problem: 64 – 45 = 19 Remember you’re actually taking 10 from 60
  7. 7. 313 Give the 1 ten to the 3 to make 13. 8 7 Borrow 1 ten from the 8. 2 6 You can’t take 6 from 3 so you must regroup the 83. Now subtract. 5 7 Let’s read the completed problem: 83 – 26 = 57 Remember you’re actually taking 10 from 80

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