2. 3/4 + 4/5 To find the answer to this questions you‘ll have to find the common denominator To find the common denominator (4 and 5) , you can multiply the two numbers or you could list both of the denominators and find the same number from the list. 4,8,12,16,20,24,28,32,36,40 5,10,15,20,25,30,35,40,45,50
3. 15/20+16/20 Now, you’ve got a common denominator. let’s find the numerator. In order to find the numerator you have to multiply what you have multiplied with the common denominator in both sides. Add the numbers you have found but you don’t add the common denominator .
4. The answer Now you add the numerator and leave the denominator as a same number If you add the numerator and leave the denominator the answer will come out like this (31/20) You can change it to a mixed number.
5. 3/6 – 3/8 For subtraction, you have to find the common denominator. To find the common denominator, the denominator have to be same so you could multiply the number or you could find it like this 6,12,18.24,30,36,42,48,54,60 8,16,24,32,40,48,56,64,72 Subtract the fraction
6. Subtract the numerator and leave the denominators behind 12/24 – 9/24 After you subtract the numerator you will get an answer like this (3/24)
