Subtraction Shortcuts

Subtraction Shortcuts - 8 0 0 2 3 7 6 5 7 9 9 1 7 3 2 4...

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Subtraction Shortcuts and Tips By Monica Yuskaitis
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Subtracting Across Zeros 3 0 2 1 9 8
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Step 1 – Borrow 1 from the 30 3 0 2 1 9 8
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Step 2 – Cross out the 30 3 0 2 1 9 8
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Step 3 – Write a 29 above the 30 3 0 2 1 9 8 2 9
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Step 4 – Write a 1 in front of the 2 3 0 2 1 9 8 2 9 1
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Step 5 – Subtract 8 from 12 3 0 2 1 9 8 2 9 1 4
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Step 6 – Subtract 9 from 9 3 0 2 1 9 8 2 9 1 4 0
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Step 7 – Subtract 1 from 2 3 0 2 1 9 8 2 9 1 4 0 1
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We’re Finished 3 0 2 1 9 8 2 9 1 4 0 1
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Second Example 8 0 0 2 3 7 6 5
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Step 1 – Borrow 1 from 800 8 0 0 2 3 7 6 5
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Step 2 – Cross out the 800 8 0 0 2 3 7 6 5
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Step 3 – Write 799 above the 800 8 0 0 2 3 7 6 5 7 9 9
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Step 4 – Write a 1 next to the 2 8 0 0 2 3 7 6 5 7 9 9 1
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Step 5 – Subtract 5 from the 12 8 0 0 2 3 7 6 5 7 9 9 1 7
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Step 6 – Subtract 6 from the 9 8 0 0 2 3 7 6 5 7 9 9 1 7 3
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Step 7 – Subtract 6 from the 9 8 0 0 2 3 7 6 5 7 9 9 1 7 3 2
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Step 7 – Subtract 3 from the 7
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Unformatted text preview: 8 0 0 2 3 7 6 5 7 9 9 1 7 3 2 4 Were Finished 8 0 0 2 3 7 6 5 7 9 9 1 7 3 2 4 Its Your Turn 7 0 0 5 2 8 3 6 6 9 9 1 9 6 1 4 Its Your Turn Again 9 0 0 4 7 9 5 6 8 9 9 1 8 4 1 Subtraction Tips Never subtract the top number from the bottom number 4 6 6 6 1 3 2 7 9 Your answer will always be wrong. Never borrow unless you need to 9 6 2 8 4 1 1 5 Your answer will always be wrong. Practice your subtraction facts 18 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 = 9 11 8 6 3 8 8 6 13 15 9 8 8 4 9 4...
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This note was uploaded on 11/22/2011 for the course EL ED 361 taught by Professor Brotherraymond during the Fall '11 term at BYU.

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Subtraction Shortcuts - 8 0 0 2 3 7 6 5 7 9 9 1 7 3 2 4...

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