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2 years ago

9

Instead of dividing 220 x 5 double both numbers and mentally calculate the quotient

1 answer:

kobusy [5.1K]2 years ago

3 0

220 * 5 = 220 * 2/2 * 5 * 2/2 = 440 * 10 / 4 = 110 * 10 = 1100

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