Download presentation

Presentation is loading. Please wait.

Published byKya Ellers Modified over 2 years ago

1
Regrouping for Double-Digit Subtraction Two-Digit Subtraction – Regrouping

2
Two approaches: Two-Digit Subtraction – Regrouping “10 First” Approach Common Approach

3
1. “10 First” Approach Two-Digit Subtraction – Regrouping 6 23 -16 23 -16

4
Start with subtracting the units column Two-Digit Subtraction – Regrouping 23 -16 23 -16 36363636

5
First, put 3 on Mathline Two-Digit Subtraction – Regrouping 23 -16 23 -16

6
Can we subtract six? Two-Digit Subtraction – Regrouping 23 -16 23 -16 6

7
6 No, 3 is less than 6 Two-Digit Subtraction – Regrouping So we need to regroup

8
23 -16 23 -16 6 10 First Approach! Two-Digit Subtraction – Regrouping

9
23 -16 23 -16 6 Start by clearing the MathLine Two-Digit Subtraction – Regrouping

10
23 -16 23 -16 6 Count 10 from right and move over Two-Digit Subtraction – Regrouping

11
23 -16 23 -16 6 This is regrouping Two-Digit Subtraction – Regrouping 11 One ten becomes ten ones

12
23 -16 23 -16 6 Now put the 3 ones back Two-Digit Subtraction – Regrouping 11

13
23 -16 23 -16 6 Now put the 3 ones back Two-Digit Subtraction – Regrouping 11 36363636

14
23 -16 23 -16 6 Two-Digit Subtraction – Regrouping 11 36363636 See 13

15
23 -16 23 -16 6 Now take 13 minus 6 Two-Digit Subtraction – Regrouping 11 36363636 123 45 6

16
23 -16 23 -16 6 See 7 Two-Digit Subtraction – Regrouping 11 36363636 7

17
Now we clear the MathLine to subtract the tens column Two-Digit Subtraction – Regrouping 23 -16 23 -16 1 7 1

18
Count ten rings on MathLine Two-Digit Subtraction – Regrouping 23 -16 23 -16 7 11 7

19
Two-Digit Subtraction – Regrouping 23 -16 23 -16 7 11 7 Then subtract 10 Count ten rings on MathLine

20
Two-Digit Subtraction – Regrouping 23 -16 23 -16 7 11 7 See zero on MathLine 0

21
2. Common Approach Two-Digit Subtraction – Regrouping 6 23 -16 23 -16

22
Start with subtracting the units column Two-Digit Subtraction – Regrouping 23 -16 23 -16 36363636

23
First, put 3 on Mathline Two-Digit Subtraction – Regrouping 23 -16 23 -16

24
Can we subtract six? Two-Digit Subtraction – Regrouping 23 -16 23 -16 6

25
6 No, 3 is less than 6 Two-Digit Subtraction – Regrouping So we need to regroup

26
23 -16 23 -16 6 Common Approach! Two-Digit Subtraction – Regrouping

27
23 -16 23 -16 Count 10 rings from the right side to regroup. Two-Digit Subtraction – Regrouping 1

28
23 -16 23 -16 Two-Digit Subtraction – Regrouping 12 Count 10 rings from the right side to regroup.

29
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 123

30
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 231 4

31
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 23145

32
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 231456

33
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 2314567

34
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 23145678

35
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 231456789

36
23 -16 23 -16 Two-Digit Subtraction – Regrouping Count 10 rings from the right side to regroup. 23145678910

37
23 -16 23 -16 6 Explain this ten came from the tens column 11 Two-Digit Subtraction – Regrouping Move rings to the left. This is regrouping! 23 -16 23 -16

38
Two-Digit Subtraction – Regrouping 23-16 23-16 23-16 23-16 11 Next, subtract 13 minus 6 123 45 6 1

39
Two-Digit Subtraction – Regrouping 23 -16 23 -16 11 See 7 in the ones column 7 1

40
Now we clear the MathLine to subtract the tens column Two-Digit Subtraction – Regrouping 23 -16 23 -16 1 7 1

41
Count ten rings on MathLine Two-Digit Subtraction – Regrouping 23 -16 23 -16 7 11 7

42
Two-Digit Subtraction – Regrouping 23 -16 23 -16 7 11 7 Then subtract 10 Count ten rings on MathLine

43
Two-Digit Subtraction – Regrouping 23 -16 23 -16 7 11 7 See zero on MathLine 0

Similar presentations

OK

Add 2-digit numbers with regrouping. Add 2-digit numbers with regrouping 1- 4 3 1 60 1 81 1 91 1 93 1 01.

Add 2-digit numbers with regrouping. Add 2-digit numbers with regrouping 1- 4 3 1 60 1 81 1 91 1 93 1 01.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on natural resources for class 9 Ppt on indian premier league Ppt on product advertising samples Ppt on summary writing exercise Ppt on design and analysis of algorithms Ppt on polynomials in maths what is the factor Download ppt on live line maintenance Ppt on javascript events mouse Ppt on rbi reforms meaning Ppt on power sharing in democracy