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12/3+21/4+25/6... Ignore the whole numbers for a moment....

2/3+1/4+5/6. Give them all the same denominator so you have...

8/12+3/12+10/12 Now - add the top numbers of the fractions together...

8+3+10=21. 21/12 = 19/12 Finally, add all the whole numbers from the original sum (5) to give you your final sum of 69/12. Your last step is to simplify the fraction to 63/4

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13y ago

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