Decimals: Multiplying by 2.5

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Presentation transcript:

Decimals: Multiplying by 2.5 Silent Teacher Intelligent Practice Narration Your Turn 20 x 1.5 = 30 60 x 1.5 = 80 30 x 1.5 = 45 Example For more videos visit mrbartonmaths.com/videos

Worked Example Your turn 24 x 2.5 12 x 2.5 @mathsmrgordon

100 x 2.5 = 250 True / False 50 x 2.5 = 120 True / False Have these numbers been multiplied by 2.5? 100 x 2.5 = 250 True / False 50 x 2.5 = 120 True / False 5 x 2.5 = 12.5 True / False 15 x 2.5 = 37.5 True / False 20 x 2.5 = 45 True / False 2.5 x 20 = 50 True / False 50 ÷ 2.5 = 20 True / False @mathsmrgordon

100 x 2.5 = 250 True / False 50 x 2.5 = 120 True / False Have these numbers been multiplied by 2.5? 100 x 2.5 = 250 True / False 50 x 2.5 = 120 True / False 5 x 2.5 = 12.5 True / False 15 x 2.5 = 37.5 True / False 20 x 2.5 = 45 True / False 2.5 x 20 = 50 True / False 50 ÷ 2.5 = 20 True / False @mathsmrgordon

Your Turn 300 x 2.5 = 30 x 2.5 = 2.5 x 3 = 33 x 2.5 = 16.5 x 2.5 = 1.65 x 2.5 = 4.125 ÷ 2.5 = @mathsmrgordon

Your Turn - answers 300 x 2.5 = 750 30 x 2.5 = 75 2.5 x 3 = 7.5 33 x 2.5 = 82.5 16.5 x 2.5 = 41.25 1.65 x 2.5 = 4.125 4.125 ÷ 2.5 = 1.65 @mathsmrgordon