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2. 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 ≈
0.8
[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]
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3. Find the answer which best estimates:
2.6 x ≈
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 ≈ 11
5.1 ÷ ≈ 20
[44 x 0.25 = quarter of 44]
[5 ÷ 0.25 = quarters going into 5]
178.6 x 0.09 ≈ 18
181 ÷ ≈
1800
[180 x 0.1 = tenth of 180]
[180 ÷ 0.1 = tenths going into 180]
60 x ≈ 40
1.21 ÷ ≈ 6
[60 x 0.75 = three quarters of 60]
[1.2 ÷ 0.2 = 0.2’s going into 1.2]
80.5 x ≈ 10
4 ÷ 0.33 ≈ 12
[80 x ⅛ = eighth of 80]
[4 ÷ ⅓ = thirds going into 4]
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4. Find the answer which best estimates:
7.1 ÷ ≈ 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 ÷ ≈ 40
[80 ÷ 0.25 = quarters going into 80]
[5 ÷ ⅛ = eights going into 5]
111 ÷ ≈
1100
0.17 ÷ ≈ 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 ÷ ≈ 33
[1.8 ÷ 0.3 = 0.3’s going into 1.8]
[11 ÷ ⅓ = thirds going into 11]
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5. Quick
Test
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6. 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 ≈
0.8
[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

7. Find the answer which best estimates:
2.6 x ≈
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 ≈ 11
5.1 ÷ ≈ 20
[44 x 0.25 = quarter of 44]
[5 ÷ 0.25 = quarters going into 5]
178.6 x 0.09 ≈ 18
181 ÷ ≈
1800
[180 x 0.1 = tenth of 180]
[180 ÷ 0.1 = tenths going into 180]
60 x ≈ 40
1.21 ÷ ≈ 6
[60 x 0.75 = three quarters of 60]
[1.2 ÷ 0.2 = 0.2’s going into 1.2]
80.5 x ≈ 10
4 ÷ 0.33 ≈ 12
[80 x ⅛ = eighth of 80]
[4 ÷ ⅓ = thirds going into 4]
© T Madas

8. Find the answer which best estimates:
7.1 ÷ ≈ 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 ÷ ≈ 40
[80 ÷ 0.25 = quarters going into 80]
[5 ÷ ⅛ = eights going into 5]
111 ÷ ≈
1100
0.17 ÷ ≈ 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 ÷ ≈ 33
[1.8 ÷ 0.3 = 0.3’s going into 1.8]
[11 ÷ ⅓ = thirds going into 11]
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9. © T Madas