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You know that 15 x 16 equals 240 how can you use this to work out 16 x 16?
Wiki User
∙ 14y ago
Simple. 15 x 16 is really saying add 16 to itself 15 times. So when you change the problem to 16 x 16, you just add another 16.
15 x 16 = 240
16 x 16 = 256
Wiki User
∙ 14y ago
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