Exam Questions — Number
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Showing 10 questions.
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{21.3 \times 5.1}{0.72}.\end{aligned}
Answer:
\[\approx 150\]
Solution:
\begin{aligned}&\tfrac{21\times5}{0.7}=\tfrac{105}{0.7}\approx150.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{14.9 \times 2.7}{0.38}.\end{aligned}
Answer:
\[\approx 110\]
Solution:
\begin{aligned}&\tfrac{15\times3}{0.4}=\tfrac{45}{0.4}=112.5.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{11.6 \times 7.2}{0.62}.\end{aligned}
Answer:
\[\approx 130\]
Solution:
\begin{aligned}&\tfrac{12\times7}{0.6}=\tfrac{84}{0.6}=140.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{8.4 \times 3.9}{0.47}.\end{aligned}
Answer:
\[\approx 70\]
Solution:
\begin{aligned}&\tfrac{8\times4}{0.5}=\tfrac{32}{0.5}=64\;\text{(close to 70)}.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{9.6 \times 18.4}{0.48}.\end{aligned}
Answer:
\[\approx 370\]
Solution:
\begin{aligned}&\tfrac{10\times18}{0.5}=\tfrac{180}{0.5}=360.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{19.8 \times 4.2}{0.21}.\end{aligned}
Answer:
\[\approx 400\]
Solution:
\begin{aligned}&\tfrac{20\times4}{0.2}=\tfrac{80}{0.2}=400.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{4.8 \times 6.2}{0.29}.\end{aligned}
Answer:
\[\approx 100\]
Solution:
\begin{aligned}&\tfrac{5\times6}{0.3}=\tfrac{30}{0.3}=100.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{7.9 \times 12.3}{0.41}.\end{aligned}
Answer:
\[\approx 240\]
Solution:
\begin{aligned}&\tfrac{8\times12}{0.5}=\tfrac{96}{0.5}=192\;\text{(close to 200)}.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{15.2 \times 9.7}{0.52}.\end{aligned}
Answer:
\[\approx 300\]
Solution:
\begin{aligned}&\tfrac{15\times10}{0.5}=\tfrac{150}{0.5}=300.\end{aligned}
3 marks
Foundation
Edexcel
Number
\begin{aligned}&\text{Work out an estimate for } \tfrac{6.4 \times 13.7}{0.33}.\end{aligned}
Answer:
\[\approx 260\]
Solution:
\begin{aligned}&\tfrac{6\times14}{0.3}=\tfrac{84}{0.3}=280.\end{aligned}