This pdf includes:- Reciprocal How to find reciprocal What is the use of reciprocal
1. Reciprocals A reciprocal is the value used to multiply a number by to make the product 1 Find the reciprocal of 2: 1 What do we multiply 2 by to get 2x =1 2 a product of 1? Why? Think of multiplying fractions 2 x 1 = 2 = 1 1 2 2 Find the reciprocal of : 1 2 x 2 = 1 Multiplication is commutable 2 Find the reciprocal of 3: 1 What do we multiply 3 by to get 3x =1 3 a product of 1? Find the reciprocal of 10: 1 What do we multiply 10 by to get 10 x 10 =1 a product of 1?
2. Reciprocals 3 Find the reciprocal of 4 : 3 x 4 =1 What do we multiply 3 by to get 4 3 4 a product of 1? Remember how to multiply fractions: 3 x 4 = 12 =1 4 3 12 Find the reciprocal of 0.7 : 7 x 10 = 1 0.7 = 7 10 10 7 10 3 Now change into a mixed number 17 7 So the reciprocal of 0.7 is 13 7
3. Reciprocals Find the reciprocal of 2 2 3 First write the mixed number as a top heavy fraction 8 3 then follow the same process 8 3 Now you know the principles the shortcut to finding a reciprocal is to swap the numerator and denominator over 8 x =1 3
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