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Find the answer which best estimates: 34.1 x 0.48 ≈ 17 74.1 x 0.21 ≈ 15 [34 x 0.5 = half of 34] [75 x 0.2 = fifth of 75] 48 x 0.26 ≈ 12 78 x 0.41 ≈ 32 [48 x 0.25 = quarter of 48] [80 x 0.4 = two fifths of 80] 59.6 x 0.11 ≈ 6 1.81 x 0.49 ≈ 0.9 [60 x 0.1 = tenth of 60] [1.8 x 0.5 = half of 1.8] 39 x 0.77 ≈ 30 3.22 x 0.241 ≈ 0.8 [40 x 0.75 = three quarters of 40] [3.2 x 0.25 = quarter of 3.2] 119 x 0.34 ≈ 40 178 x 0.67 ≈ 120 [120 x ⅓ = third of 120] [180 x ⅔ = two thirds of 180] © T Madas
Find the answer which best estimates: 2.6 x 0.507 ≈ 1.3 24.1 ÷ 0.51 ≈ 48 [2.6 x 0.5 = half of 2.6] [74.1 ÷ 0.51 = halves going into 75] 45 x 0.244 ≈ 11 5.1 ÷ 0.255 ≈ 20 [44 x 0.25 = quarter of 44] [5 ÷ 0.25 = quarters going into 5] 178.6 x 0.09 ≈ 18 181 ÷ 0.102 ≈ 1800 [180 x 0.1 = tenth of 180] [180 ÷ 0.1 = tenths going into 180] 60 x 0.744 ≈ 40 1.21 ÷ 0.199 ≈ 6 [60 x 0.75 = three quarters of 60] [1.2 ÷ 0.2 = 0.2’s going into 1.2] 80.5 x 0.125 ≈ 10 4 ÷ 0.33 ≈ 12 [80 x ⅛ = eighth of 80] [4 ÷ ⅓ = thirds going into 4] © T Madas
Find the answer which best estimates: 7.1 ÷ 0.487 ≈ 14 6.07 ÷ 0.41 ≈ 15 [7 ÷ 0.5 = halves going into 7] [6 ÷ 0.4 = 0.4’s going into 6] 81 ÷ 0.26 ≈ 320 5.07 ÷ 0.124 ≈ 40 [80 ÷ 0.25 = quarters going into 80] [5 ÷ ⅛ = eights going into 5] 111 ÷ 0.1009 ≈ 1100 0.17 ÷ 0.011 ≈ 17 [110 ÷ 0.1 = tenths going into 110] [0.17 ÷ 0.01 = hundredths going into 0.17] 5.99 ÷ 1.51 ≈ 4 5 ÷ 0.19 ≈ 25 [6 ÷ 1.5 = 1.5’s going into 6] [5 ÷ 0.2 = 0.2’s going into 5] 1.78 ÷ 0.3 ≈ 6 10.95 ÷ 0.325 ≈ 33 [1.8 ÷ 0.3 = 0.3’s going into 1.8] [11 ÷ ⅓ = thirds going into 11] © T Madas
Quick Test © T Madas
Find the answer which best estimates: 34.1 x 0.48 ≈ 17 74.1 x 0.21 ≈ 15 [34 x 0.5 = half of 34] [75 x 0.2 = fifth of 75] 48 x 0.26 ≈ 12 78 x 0.41 ≈ 32 [48 x 0.25 = quarter of 48] [80 x 0.4 = two fifths of 80] 59.6 x 0.11 ≈ 6 1.81 x 0.49 ≈ 0.9 [60 x 0.1 = tenth of 60] [1.8 x 0.5 = half of 1.8] 39 x 0.77 ≈ 30 3.22 x 0.241 ≈ 0.8 [40 x 0.75 = three quarters of 40] [3.2 x 0.25 = quarter of 3.2] 119 x 0.34 ≈ 40 178 x 0.67 ≈ 120 [120 x ⅓ = third of 120] [180 x ⅔ = two thirds of 180] © T Madas
Find the answer which best estimates: 2.6 x 0.507 ≈ 1.3 24.1 ÷ 0.51 ≈ 48 [2.6 x 0.5 = half of 2.6] [74.1 ÷ 0.51 = halves going into 75] 45 x 0.244 ≈ 11 5.1 ÷ 0.255 ≈ 20 [44 x 0.25 = quarter of 44] [5 ÷ 0.25 = quarters going into 5] 178.6 x 0.09 ≈ 18 181 ÷ 0.102 ≈ 1800 [180 x 0.1 = tenth of 180] [180 ÷ 0.1 = tenths going into 180] 60 x 0.744 ≈ 40 1.21 ÷ 0.199 ≈ 6 [60 x 0.75 = three quarters of 60] [1.2 ÷ 0.2 = 0.2’s going into 1.2] 80.5 x 0.125 ≈ 10 4 ÷ 0.33 ≈ 12 [80 x ⅛ = eighth of 80] [4 ÷ ⅓ = thirds going into 4] © T Madas
Find the answer which best estimates: 7.1 ÷ 0.487 ≈ 14 6.07 ÷ 0.41 ≈ 15 [7 ÷ 0.5 = halves going into 7] [6 ÷ 0.4 = 0.4’s going into 6] 81 ÷ 0.26 ≈ 320 5.07 ÷ 0.124 ≈ 40 [80 ÷ 0.25 = quarters going into 80] [5 ÷ ⅛ = eights going into 5] 111 ÷ 0.1009 ≈ 1100 0.17 ÷ 0.011 ≈ 17 [110 ÷ 0.1 = tenths going into 110] [0.17 ÷ 0.01 = hundredths going into 0.17] 5.99 ÷ 1.51 ≈ 4 5 ÷ 0.19 ≈ 25 [6 ÷ 1.5 = 1.5’s going into 6] [5 ÷ 0.2 = 0.2’s going into 5] 1.78 ÷ 0.3 ≈ 6 10.95 ÷ 0.325 ≈ 33 [1.8 ÷ 0.3 = 0.3’s going into 1.8] [11 ÷ ⅓ = thirds going into 11] © T Madas
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