subtract+fractions



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How to subtract fractions: To subtract fractions you have to make both fractions denominators the same (common denominator). The next step is to subtract the numerators together. The denominator would be the common denominator.

How to add fractions.... 1.Clocks 2.$ Money 3.Double Number Lines 4.Standard Algorithm

2 Examples of adding fractions

1. Subtracting Fractions using Clocks
2/3 - 4/5 The first step to subtracting fractions using clocks is to divide the denominators to 60. 2/3, denominator: 60/3 = 20, 4/5, denominator: 60/5 = 12. Then you multiply the numerator to the answers. 2/3, 60/3 = 20 x 2 = 40, 4/5, 60/5 = 12 x 4 = 48. You then subtract both answer together, 48 - 40 = 8. The answer would be the numerator and the denominator would be 60, 8/60.You can't turn it into a mix number because the numerator isn't larger than the denominator but you can simplify it, 8/60 = 2/15.

2. Subtracting Fractions using $ Money
2/4 - 4/5 = Using money to subtract fractions you first need to divide the denominators to 100 then multiply the answer to the numerator. (2/4) 100/4 = 25 x 2 = 50, (4/5) 100/5 = 20 x 4 = 80. Then add both answer together. 50+80 = 130. Then turn it into a mixed fractions130/100, to turn them into mixed fraction you have to subtract 100 - 130 =1 30/100.

3. Subtracting Fractions using Double Number Lines
2/4 - 4/5 To subtract fractions using Double Number Line you have to multiply the denominators together (2/4 - 4/5) 4 x 5 = 20, then divide the denominators to the answer 4/20 = 5 & 5/20 = 4 then multiply the answers to the numerators 4/20 = 5 x 2 = 10 & 5/20 = 4 x 4 = 16. Then you just have to show it on a double number line.

4. Subtracting Fraction using Standard Algorithm
2/10 - 4/5 To subtract fractions using Standard Algorithm you have to make both denominators the same. To make both denominators the same you can either multiply or divide. To find the same denominator using multiplication you just have to multiply both denominators ( 2/10 - 4/5) 10 x 5 = 50. To find the same denominator using division you have to find a number that can you into both denominators ( 2/10 - 4/5) 5 can go into 10 & 5. So the answer in either multiplication or division will be the new denominator. Once you find the denominator you just have to subtract the numerators together ( 2/10 - 4/5) 2-4=6.