Subtraction Shortcuts and Tips By Monica Yuskaitis Subtracting
Subtraction Shortcuts and Tips By Monica Yuskaitis
Subtracting Across Zeros 302 198
Step 1 – Borrow 1 from the 30 302 198
Step 2 – Cross out the 30 302 198
Step 3 – Write a 29 above the 30 2 9 302 198
Step 4 – Write a 1 in front of the 2 2 9 3 0 12 198
Step 5 – Subtract 8 from 12 2 9 3 0 12 198 4
Step 6 – Subtract 9 from 9 2 9 3 0 12 198 04
Step 7 – Subtract 1 from 2 2 9 3 0 12 198 104
We’re Finished 2 9 3 0 12 198 104
Second Example 8002 3765
Step 1 – Borrow 1 from 8002 3765
Step 2 – Cross out the 8002 3765
Step 3 – Write 799 above the 800 7 9 9 8002 3765
Step 4 – Write a 1 next to the 2 7 9 9 8 0 0 12 3765
Step 5 – Subtract 5 from the 12 7 9 9 8 0 0 12 3765 7
Step 6 – Subtract 6 from the 9 7 9 9 8 0 0 12 3765 37
Step 7 – Subtract 6 from the 9 7 9 9 8 0 0 12 3765 2 37
Step 7 – Subtract 3 from the 7 7 9 9 8 0 0 12 3765 4 2 37
We’re Finished 7 9 9 8 0 0 12 3765 4 2 37
It’s Your Turn 6 9 9 7 0 0 15 2836 4 1 69
It’s Your Turn Again 8 9 9 9 0 0 14 7956 1 0 48
Subtraction Tips
Never subtract the top number from the bottom number 613 279 466 Your answer will always be wrong.
Never borrow unless you need to 5 9 6 12 841 Your answer will always be wrong.
Practice your subtraction facts – 9= 9 Ø 18 – 7 = 11 Ø 16 – 8 = 8 Ø 14 – 8 = 6 Ø 12 – 9 = 3 Ø 11 – 3 = 8 Ø 15 – 7 = 8 Ø 9 – 3 = 6 Ø 18 – 5 = 13 Ø 18 – 3 = 15 Ø 16 – 7 = 9 Ø 14 – 6 = 8 Ø 12 – 4 = 8 Ø 11 – 7 = 4 Ø 15 – 6 = 9 Ø 9 – 5 = 4 Ø 18
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