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Unformatted text preview: How long did the three tasks take, as a fraction of an hour? 60 21 60 12 60 7 + + = 60 40 = 3 2 3 2 of an hour 222 50 Find the perimeters of the following triangles. cm 8 3 cm 8 3 cm 8 3 cm 8 1 1 8 9 8 3 8 3 8 3 = = + + cm 8 1 1 228 22 Find the least common multiple (LCM) for each of the following groups of numbers. Use whichever method you wish. 12, 20, and 35 12: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 168, 180, 192, 204, 216, 228, 240, 252, 264, 276, 288, 300, 312, 324, 336, 348, 360, 372, 384, 396, 408, 420 20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420 35: 35, 70, 105, 140, 175, 210, 245, 280, 315, 350, 385, 420 420 241 36 Add 5 4 12 5 3 1 + + 60 20 20 3 20 1 = 60 25 5 12 5 5 = 60 48 12 5 12 4 = 20 11 1...
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 Spring '10
 ELLIOT

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