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11:57 .1 5G8 D 32 480 4 of 8 (c) 32 x 15 160 32 192 (d) 32 x 15 is the same as 16
11:57 .1 5G8 D 32 480 4 of 8 (c) 32 x 15 160 32 192 (d) 32 x 15 is the same as 16 x 30, which is 480. Problem 13.7 Compute 18 x 127 using the Russian peasant algorithm. Problem 13.8 What property of the whole numbers justifies each step in this calculation? 17 . 4 = (10 + 7) . 4 Expanded notation 10 . 4 + 7 . 4 11 11 10 . 4 + 28 multiplication = 10 . 4 + (2 . 10 + 8) expanded notation = 4 . 10 + (2 . 10 + 8) (4 . 10 + 2 . 10) + 8 = (4 + 2) . 10 +8 = 60 + 8 multiplication 68 addition 4 Problem 13.9 Fill in the missing digit in each of the following. (a) 4 6 (b) 327 x 783 x 9 1 1 78 3 27 3408 1 08 982 9 3 3335 8 30 07 Problem 13.10 Complete the following table: a b ab atb 56 3752 32 110 270 33 Problem 13.11 Find the products of the following and describe the pattern that Emerges! purdue.brightspace.com
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