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Regrouping to Subtract Mixed Numbers. 1 . Change the problem from sideways to up and down. 2. Look to see if the problem can be done the way it is. . EX. 4 - 2 ⅜ 4 - 2⅜. 3. If it cannot be done the way it is, you have to borrow.
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1. Change the problem from sideways to up and down. 2. Look to see if the problem can be done the way it is. EX. 4 - 2⅜ 4 - 2⅜ 3. If it cannot be done the way it is, you have to borrow. 4. Cross out the whole number and reduce it by one. 3 8 8 5. Since you borrowed “1” from the whole number, write it as a fraction meaning “1” but using the denominator you need. EX. 4 - 2⅜
3 8 8 EX. 4 - 2⅜ 1 ⅝ 6. Subtract the fractions. Then subtract the whole numbers. Make sure your answer is in simplest form.
2. Look to see if the problem can be done the way it is. 5⅙ - 2⅔ 5⅙ - 2⅔ 3. If it cannot be done the way it is, you have to borrow. 4. Cross out the whole number and reduce it by one. 4 6 6 7 6 5⅙+ = • 2⅔= 4 6 5. Since you borrowed “1” from the whole number, make it a fraction meaning “1” but using the denominator you need. Add it to the fraction you already have. 6. Find the LCD for the 2 fractions in the problem and make equivalent fractions.
4 6 6 7 6 5⅙+ = • 2⅔= • 2 7. Subtract the fractions. Then subtract the whole numbers. 4 6 3 6 Make sure your answer is in simplest form. 2 ½
Let’s Practice! 14 19⅟7 7⅟4 -8⅘ - 5⅓ - 3⅝ 10⅕ 1⅙ 9⅟4 - 5⅞ - ⅞ - 1¾