46
Mental Math Mental Math Digit by Digit Addition and Digit by Digit Addition and Subtraction Subtraction

Digit By Digit Addition & Subtraction

Embed Size (px)

DESCRIPTION

Digit By Digit Addition & Subtraction

Citation preview

Page 1: Digit By Digit Addition & Subtraction

Mental MathMental MathMental MathMental MathDigit by Digit Addition and Digit by Digit Addition and

SubtractionSubtraction

Page 2: Digit By Digit Addition & Subtraction

Add in Your Head

13 62 75

1 6 7I n your head add:

If there are no carries, use digit by digit addition

Page 3: Digit By Digit Addition & Subtraction

3 2

7

1 6

6

75

1I n your head add:

If there are no carries, use digit by digit addition

Add in Your Head

Page 4: Digit By Digit Addition & Subtraction

3 21 6 7

6 7

5

1I n your head add:

If there are no carries, use digit by digit addition

Add in Your Head

Page 5: Digit By Digit Addition & Subtraction

3 2

5

1 6

2

75

3I n your head add:

If there are no carries, use digit by digit addition

Add in Your Head

Page 6: Digit By Digit Addition & Subtraction

3 2

5

1 6

2

75

3I n your head add:

If there are no carries, use digit by digit addition

Add in Your Head

Page 7: Digit By Digit Addition & Subtraction

If there are no carries, use digit by digit addition

Add in Your Head

13 62 75

Done!

Page 8: Digit By Digit Addition & Subtraction

7598

1 6

137 2

7

5 62 3

I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 9: Digit By Digit Addition & Subtraction

1 6

1 6

7598375 223

7I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 10: Digit By Digit Addition & Subtraction

1 6 7

1 6

598375 223

7I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 11: Digit By Digit Addition & Subtraction

3 2

3 2

591 75 6 2

5

3 87

I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 12: Digit By Digit Addition & Subtraction

3 2 5

3 2

91 75 6 23

5

87

I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 13: Digit By Digit Addition & Subtraction

7 2

7 2

13 5 62 3 7598

9I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 14: Digit By Digit Addition & Subtraction

7 2 9

7 2

13 8

9

5 62 3 75

I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 15: Digit By Digit Addition & Subtraction

5 3

5 3

137 622 7598

8I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 16: Digit By Digit Addition & Subtraction

5 3 8

5 3

137 622 759

8I n your head add:

If there are no carries, use digit by digit addition

Any Number of Digits

Page 17: Digit By Digit Addition & Subtraction

1375 6223 7598

Done!

If there are no carries, use digit by digit addition

Any Number of Digits

Page 18: Digit By Digit Addition & Subtraction

Subtract In Your Head

83 262 1

If there are no carries, use digit by digit subtraction

Page 19: Digit By Digit Addition & Subtraction

8 6

8 6

2 75

7

3

I n your head subtract:

If there are no carries, use digit by digit subtraction

Subtract In Your Head

Page 20: Digit By Digit Addition & Subtraction

8 6 2

8 6

2

2

53

I n your head subtract:

If there are no carries, use digit by digit subtraction

Subtract In Your Head

Page 21: Digit By Digit Addition & Subtraction

3 2

3 2

8 6 25

1I n your head subtract:

If there are no carries, use digit by digit subtraction

Subtract In Your Head

Page 22: Digit By Digit Addition & Subtraction

3 2 1

3 2

8 6 2

1I n your head subtract:

If there are no carries, use digit by digit subtraction

Subtract In Your Head

Page 23: Digit By Digit Addition & Subtraction

83 62 21

Done!

If there are no carries, use digit by digit subtraction

Subtract In Your Head

Page 24: Digit By Digit Addition & Subtraction

8375 622 53 21 2

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 25: Digit By Digit Addition & Subtraction

75937 8

7

238

8 6

5 62

I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 26: Digit By Digit Addition & Subtraction

58 6 2

8

987 3

6

3 5 2

2

2

I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 27: Digit By Digit Addition & Subtraction

53 2

3

988 75 6 23 2

12I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 28: Digit By Digit Addition & Subtraction

3 2 198

3 2 1

8 75 6 23 2

I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 29: Digit By Digit Addition & Subtraction

83 5 62 3 217

2 17

982

I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 30: Digit By Digit Addition & Subtraction

83 5 62 3 217 5

7 2 5

82

I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 31: Digit By Digit Addition & Subtraction

8375 6223 21

7 5

58

2I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 32: Digit By Digit Addition & Subtraction

837 622 215

3 25

583

I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 33: Digit By Digit Addition & Subtraction

837 622 215

5 3 2

53 2

I n your head subtract:

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 34: Digit By Digit Addition & Subtraction

8375 6223 2152

Done!

If there are no carries, use digit by digit subtraction

Any Number of Digits

Page 35: Digit By Digit Addition & Subtraction

Work it out!

24 533 5

Page 36: Digit By Digit Addition & Subtraction

Work it out!

24 33 55

Page 37: Digit By Digit Addition & Subtraction

Work it out!

68 427 1

Page 38: Digit By Digit Addition & Subtraction

Work it out!

68 27 41

Page 39: Digit By Digit Addition & Subtraction

Work it out!

6,092 3,0 351 ,041

Page 40: Digit By Digit Addition & Subtraction

Work it out!

6,092 3,051 3,041

Page 41: Digit By Digit Addition & Subtraction

Work it out!

12,345 54,3 661 62 ,66

Page 42: Digit By Digit Addition & Subtraction

Work it out!

12,345 54,321 66,666

Page 43: Digit By Digit Addition & Subtraction

Work it out!

15.03 34. 474 9.77

Page 44: Digit By Digit Addition & Subtraction

Work it out!

15.03 34.74 49.77

Page 45: Digit By Digit Addition & Subtraction

Work it out!

0.0396 0.02 0.4 27 012

Page 46: Digit By Digit Addition & Subtraction

Work it out!

0.0396 0.0274 0.0122