***Magic of Multiplying By 75*** 1. Think of 75 as being (3/4) x 100. 2. Divide by 4. 3. Multiply by 3, and then multiply by 100. 4. If there is a remainder (r), then add 75r to the answer. Ex [1] 84 x 75 =_________. a) 84 ÷ 4 = 21. b) 21 x 3 = 63. 63 x 100 = 6300. c) The answer is 6300. Ex [2] 123 x 75 =_________. a) 123 ÷ 4 = 30 with a remainder of 3. b) 30 x 3 = 90. 90 x 100 = 9000. c) Since 3 is the remainder multiply 75 x 3 = 225 and add to 9000 or 9225. d) The answer is 9225.
Posted on: Sun, 12 Oct 2014 02:29:41 +0000
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