Question: er 12 Alg Add Sub of 8 - + Automatic Zoom Problem 12.4 Find the missing digits. (a) 437 (b) 721 (c) 2 1 38

er 12 Alg Add Sub of 8 - + Automatic Zoom Problem 12.4 Find the missing digits. (a) 437 (b) 721 (c) 2 1 38 1 901 + 347 24 3 +71 3 +512 6 94 0 26 59 Problem 12.5 Julien Spent one hour and 45 minutes mowing the lawn and two hours and 35 minutes trimming the hedge and some shrubs. How long did he work all together? Problem 12.6 Compute the sum 38 + 97 + 246 using scratch addition. Problem 12.7 Find the sum 3 hr 36 min 58 sec + 5 hr 56 min 27 sec. Problem 12.8 Compute the following sums using the lattice method. (a) 482 + 269 (b) 567 + 765 Problem 12.9 Larry, Curly, and Moe each add incorrectly as follows. Larry: 29 Curly: 29 Moe: 29 +83 +83 +83 1012 121 102 How would you explain their mistakes to each of them

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