Reciprocals poster Reciprocal The reciprocal of a number can be found by dividing 1 by the number A number multiplied by its reciprocal = 1 Examples 5 : Reciprocal = π or 0.2 π 4 : Reciprocal = 0.4: Reciprocal = 1 0.4 = ππ π π π or 0.25 = 2.5 When the number is a fraction the reciprocal is the fraction inverted π π : Reciprocal = 1 = 8 0.3 : 0.3 = 3 8 x π 8 1 3 7 π : Reciprocal = 2 7 Reciprocal = 10 11 4 1.7 : 1 10 = .. π π =8 =1 8 ππ : 24 = π 17 10 .. 0.18 : 0.18 = ππ Reciprocal = 18 99 7 2 = 14 14 π = 3.5 =1 π = ππ Writing the number as a fraction makes it easy to find the reciprocal π ππ Reciprocal = ππ ππ Reciprocal = ππ ππ = ππ π = ππ π π = ππ Explain which number has no reciprocal 0 because 0 x reciprocal = 0, not 1 Explain which number has the same reciprocal as itself 1 because 1 x 1 = 1 © www.teachitmaths.co.uk 2017 π x π 27914 Page 1 of 1
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