1) 43+19 is about a) 50 b) 60 c) 70 2) 11+72 is about a) 80 b) 90 c) 60 3) 27+21 is about a) 40 b) 50 c) 30 4) 15 + 61 is about a) 70 b) 60 c) 80 5) 13 + 22 is about a) 30 b) 20 c) 40 6) 14 + 84 is about a) 80 b) 90 c) 60 7) 12+13 is about a) 20 b) 10 c) 30 8) 55+34 is about a) 70 b) 60 c) 90 9) 48 + 79 is about a) 130 b) 140 c) 120 d) 100 10) 18 + 19 is about a) 35 b) 50 c) 30 d) 40 11) 95 + 45 is about a) 155 b) 150 c) 140 d) 160 12) 22 + 55 is about a) 75 b) 70 c) 80 d) 100 13) Which question matches the estimation of 110? a) 54 + 70 b) 68 + 29 c) 64 + 63 d) 61 + 49 14) Which question matches the estimation of 150? a) 65 + 84 b) 75 + 88 c) 61 + 85 d) 93 +52 15) Which question matches the estimation of 140? a) 98 + 80 b) 101 + 34 c) 75 + 75 d) 93 +52

Estimating 2-Digit Addition Problems

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