1) What is the estimated sum of 12 + 35 ? a) 10 + 40 = 50 b) 20 + 30 = 50 c) 10 + 30 = 40 2) What is the estimated sum of 27 + 41 ? a) 20 + 40 = 60 b) 30 + 40 = 70 c) 20 + 50 = 70 3) What is the estimated sum of 134 + 467 ? a) 100 + 400 = 500 b) 200 + 500 = 700 c) 100 + 500 = 600 4) What is the estimated sum of 275 + 621? a) 300 + 600 = 900 b) 200 + 700 = 900 c) 200 + 600 = 700 5) Find the estimated sum of 586 and 314. a) 800 b) 900 c) 1000 6) Estimate the sum of 4123 and 9842. a) 13000 b) 15000 c) 14000 7) Estimate the sum of 723 and 142. a) 800 b) 900 c) 1000 8) Estimate the sum of 3694 and 4582. a) 7000 b) 9000 c) 8000

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