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Subtraction shortcuts
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Transcript of Subtraction shortcuts
![Page 1: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/1.jpg)
Subtraction Shortcutsand Tips
By Monica Yuskaitis
![Page 2: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/2.jpg)
Subtracting Across Zeros
3 0 21 9 8
![Page 3: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/3.jpg)
Step 1 – Borrow 1 from the 30
3 0 21 9 8
![Page 4: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/4.jpg)
Step 2 – Cross out the 30
3 0 21 9 8
![Page 5: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/5.jpg)
Step 3 – Write a 29 above the 30
3 0 21 9 8
2 9
![Page 6: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/6.jpg)
Step 4 – Write a 1 in front of the 2
3 0 21 9 8
2 9
1
![Page 7: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/7.jpg)
Step 5 – Subtract 8 from 12
3 0 21 9 8
2 9
1
4
![Page 8: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/8.jpg)
Step 6 – Subtract 9 from 9
3 0 21 9 8
2 9
1
40
![Page 9: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/9.jpg)
Step 7 – Subtract 1 from 2
3 0 21 9 8
2 9
1
401
![Page 10: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/10.jpg)
We’re Finished
3 0 21 9 8
2 9
1
401
![Page 11: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/11.jpg)
Second Example
8 0 0 23 7 6 5
![Page 12: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/12.jpg)
Step 1 – Borrow 1 from 800
8 0 0 23 7 6 5
![Page 13: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/13.jpg)
Step 2 – Cross out the 800
8 0 0 23 7 6 5
![Page 14: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/14.jpg)
Step 3 – Write 799 above the 800
8 0 0 23 7 6 5
7 9 9
![Page 15: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/15.jpg)
Step 4 – Write a 1 next to the 2
8 0 0 23 7 6 5
7 9 9
1
![Page 16: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/16.jpg)
Step 5 – Subtract 5 from the 12
8 0 0 23 7 6 5
7 9 9
1
7
![Page 17: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/17.jpg)
Step 6 – Subtract 6 from the 9
8 0 0 23 7 6 5
7 9 9
1
73
![Page 18: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/18.jpg)
Step 7 – Subtract 6 from the 9
8 0 0 23 7 6 5
7 9 9
1
732
![Page 19: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/19.jpg)
Step 7 – Subtract 3 from the 7
8 0 0 23 7 6 5
7 9 9
1
7324
![Page 20: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/20.jpg)
We’re Finished
8 0 0 23 7 6 5
7 9 9
1
7324
![Page 21: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/21.jpg)
It’s Your Turn
7 0 0 52 8 3 6
6 9 9
1
9614
![Page 22: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/22.jpg)
It’s Your Turn Again
9 0 0 47 9 5 6
8 9 9
1
8401
![Page 23: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/23.jpg)
Subtraction Tips
![Page 24: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/24.jpg)
Never subtract the top number from the bottom number
4 6 6
6 1 32 7 9
Your answer will always be wrong.
![Page 25: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/25.jpg)
Never borrow unless you need to
9 6 28 4 1
1
5
Your answer will always be wrong.
![Page 26: Subtraction shortcuts](https://reader033.fdocuments.in/reader033/viewer/2022042716/55bab7fdbb61ebea718b4650/html5/thumbnails/26.jpg)
Practice your subtraction facts18 – 9 =18 – 7 =16 – 8 =14 – 8 =12 – 9 =11 – 3 =15 – 7 =9 – 3 =
18 – 5 =18 – 3 =16 – 7 =14 – 6 =12 – 4 =11 – 7 =15 – 6 =9 – 5 =
911863886
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