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Digit By Digit Addition & Subtraction
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Mental MathMental MathMental MathMental MathDigit by Digit Addition and Digit by Digit Addition and
SubtractionSubtraction
Add in Your Head
13 62 75
1 6 7I n your head add:
If there are no carries, use digit by digit addition
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
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
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
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
If there are no carries, use digit by digit addition
Add in Your Head
13 62 75
Done!
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
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
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
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
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
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
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
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
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
1375 6223 7598
Done!
If there are no carries, use digit by digit addition
Any Number of Digits
Subtract In Your Head
83 262 1
If there are no carries, use digit by digit 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
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
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
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
83 62 21
Done!
If there are no carries, use digit by digit subtraction
Subtract In Your Head
8375 622 53 21 2
If there are no carries, use digit by digit subtraction
Any Number of Digits
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
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
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
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
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
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
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
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
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
8375 6223 2152
Done!
If there are no carries, use digit by digit subtraction
Any Number of Digits
Work it out!
24 533 5
Work it out!
24 33 55
Work it out!
68 427 1
Work it out!
68 27 41
Work it out!
6,092 3,0 351 ,041
Work it out!
6,092 3,051 3,041
Work it out!
12,345 54,3 661 62 ,66
Work it out!
12,345 54,321 66,666
Work it out!
15.03 34. 474 9.77
Work it out!
15.03 34.74 49.77
Work it out!
0.0396 0.02 0.4 27 012
Work it out!
0.0396 0.0274 0.0122