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- so as you saw first you must have a common denominator and you must add or subtract the numerator and then we start so as you see both of the denominators are 7 so that's a common denominator so we don't change it and then we add five and one we get six and we keep the seven
- So students does any one know how to add and subtract rational numbers
- no Mr tell us how??
- 5/7+1/7=5+1/7=6/75/7-1/7=5-1/7=4/7
- so know were gonna learn how to add fractions with a different denominator.
- 1/3+1/6+5/8= 8/24+4/24+15/24=27/24=1 3/24 =1 1/8
- so know were gonna learn two lessons about subtracting fractions with the same denominator and the other one is a surprice at the end
- 5/6-1/3=4/3
- 2/3-5/4=3/1
- 1. Cross-multiply the two fractions and subtract the second number from the first to get the numerator of the answer2. Multiply the two denominators together to get the denominator of the answer.
- lets say we have a circle and half of it was shaded and only one part was left not shaded then that is 1/3and we have a square which only was shaded twice so it 2/4 so if we add them we get 3/7 simple.
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