Question
Round the following answers off to a decimal places. \( \begin{array}{ll}\text { (a) } \sqrt{8} & \text { (b) } \frac{3}{9} \\ \text { c) } 2 \div 7 & \text { (d) } \sqrt[3]{96} \\ \text { e) } 58 \div 89 & \text { () } \sqrt{77} \\ \text { g) } 83 \div 11 & \text { (h) } \frac{15}{23} \\ \text { i) } \sqrt[3]{72} & \text { i) } 14 \div 99\end{array} \)
Ask by Sherman Hill. in South Africa
Jan 23,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
Here are the rounded answers to two decimal places:
\[
\begin{array}{ll}
\text{(a) } \sqrt{8} & \approx 2.83 \\
\text{(b) } \frac{3}{9} & \approx 0.33 \\
\text{(c) } 2 \div 7 & \approx 0.29 \\
\text{(d) } \sqrt[3]{96} & \approx 4.58 \\
\text{(e) } 58 \div 89 & \approx 0.65 \\
\text{(f) } \sqrt{77} & \approx 8.77 \\
\text{(g) } 83 \div 11 & \approx 7.55 \\
\text{(h) } \frac{15}{23} & \approx 0.65 \\
\text{(i) } \sqrt[3]{72} & \approx 4.16 \\
\text{(j) } 14 \div 99 & \approx 0.14 \\
\end{array}
\]
Solution
Round the number by following steps:
- step0: Round \(\sqrt{77}\) to \(2\) decimal places using standard rounding method:
\(\sqrt{77}\)
- step1: Rewrite in decimal:
\(8.774964\)
- step2: Round \(8.774964\) to \(2\) decimal places using standard rounding method\(:\)
\(8.77\)
Round the number \( 58 \div 89 \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(58 \div 89\) to \(2\) decimal places using standard rounding method:
\(58 \div 89\)
- step1: Evaluate:
\(58\div 89\)
- step2: Rewrite the expression:
\(\frac{58}{89}\)
- step3: Rewrite in decimal:
\(0.651685\)
- step4: Round \(0.651685\) to \(2\) decimal places using standard rounding method\(:\)
\(0.65\)
Round the number \( 14 \div 99 \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(14 \div 99\) to \(2\) decimal places using standard rounding method:
\(14 \div 99\)
- step1: Evaluate:
\(14\div 99\)
- step2: Rewrite the expression:
\(\frac{14}{99}\)
- step3: Rewrite in decimal:
\(0.141414\)
- step4: Round \(0.141414\) to \(2\) decimal places using standard rounding method\(:\)
\(0.14\)
Round the number \( \frac{15}{23} \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(\frac{15}{23}\) to \(2\) decimal places using standard rounding method:
\(\frac{15}{23}\)
- step1: Rewrite in decimal:
\(0.652174\)
- step2: Round \(0.652174\) to \(2\) decimal places using standard rounding method\(:\)
\(0.65\)
Round the number \( \sqrt{8} \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(\sqrt{8}\) to \(2\) decimal places using standard rounding method:
\(\sqrt{8}\)
- step1: Write as a product:
\(\sqrt{4\times 2}\)
- step2: Write in exponential form:
\(\sqrt{2^{2}\times 2}\)
- step3: Use the properties of radicals:
\(\sqrt{2^{2}}\times \sqrt{2}\)
- step4: Simplify the root:
\(2\sqrt{2}\)
- step5: Rewrite in decimal:
\(2.828427\)
- step6: Round \(2.828427\) to \(2\) decimal places using standard rounding method\(:\)
\(2.83\)
Round the number \( \frac{3}{9} \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(\frac{3}{9}\) to \(2\) decimal places using standard rounding method:
\(\frac{3}{9}\)
- step1: Reduce the fraction:
\(\frac{1}{3}\)
- step2: Rewrite in decimal:
\(0.333333\)
- step3: Round \(0.333333\) to \(2\) decimal places using standard rounding method\(:\)
\(0.33\)
Round the number \( 83 \div 11 \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(83 \div 11\) to \(2\) decimal places using standard rounding method:
\(83 \div 11\)
- step1: Evaluate:
\(83\div 11\)
- step2: Rewrite the expression:
\(\frac{83}{11}\)
- step3: Rewrite in decimal:
\(7.545455\)
- step4: Round \(7.545455\) to \(2\) decimal places using standard rounding method\(:\)
\(7.55\)
Round the number \( 2 \div 7 \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(2 \div 7\) to \(2\) decimal places using standard rounding method:
\(2 \div 7\)
- step1: Evaluate:
\(2\div 7\)
- step2: Rewrite the expression:
\(\frac{2}{7}\)
- step3: Rewrite in decimal:
\(0.285714\)
- step4: Round \(0.285714\) to \(2\) decimal places using standard rounding method\(:\)
\(0.29\)
Round the number \( \sqrt[3]{72} \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(\sqrt[3]{72}\) to \(2\) decimal places using standard rounding method:
\(\sqrt[3]{72}\)
- step1: Write as a product:
\(\sqrt[3]{8\times 9}\)
- step2: Write in exponential form:
\(\sqrt[3]{2^{3}\times 9}\)
- step3: Use the properties of radicals:
\(\sqrt[3]{2^{3}}\times \sqrt[3]{9}\)
- step4: Simplify the root:
\(2\sqrt[3]{9}\)
- step5: Rewrite in decimal:
\(4.160168\)
- step6: Round \(4.160168\) to \(2\) decimal places using standard rounding method\(:\)
\(4.16\)
Round the number \( \sqrt[3]{96} \) into 2 decimal places.
Round the number by following steps:
- step0: Round \(\sqrt[3]{96}\) to \(2\) decimal places using standard rounding method:
\(\sqrt[3]{96}\)
- step1: Write as a product:
\(\sqrt[3]{8\times 12}\)
- step2: Write in exponential form:
\(\sqrt[3]{2^{3}\times 12}\)
- step3: Use the properties of radicals:
\(\sqrt[3]{2^{3}}\times \sqrt[3]{12}\)
- step4: Simplify the root:
\(2\sqrt[3]{12}\)
- step5: Rewrite in decimal:
\(4.578857\)
- step6: Round \(4.578857\) to \(2\) decimal places using standard rounding method\(:\)
\(4.58\)
Here are the rounded answers to two decimal places:
\[
\begin{array}{ll}
\text{(a) } \sqrt{8} & \approx 2.83 \\
\text{(b) } \frac{3}{9} & \approx 0.33 \\
\text{(c) } 2 \div 7 & \approx 0.29 \\
\text{(d) } \sqrt[3]{96} & \approx 4.58 \\
\text{(e) } 58 \div 89 & \approx 0.65 \\
\text{(f) } \sqrt{77} & \approx 8.77 \\
\text{(g) } 83 \div 11 & \approx 7.55 \\
\text{(h) } \frac{15}{23} & \approx 0.65 \\
\text{(i) } \sqrt[3]{72} & \approx 4.16 \\
\text{(j) } 14 \div 99 & \approx 0.14 \\
\end{array}
\]
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Bonus Knowledge
Sure! Here are the calculations rounded to one decimal place: (a) \( \sqrt{8} \approx 2.8 \) (b) \( \frac{3}{9} = 0.3 \) (c) \( 2 \div 7 \approx 0.3 \) (d) \( \sqrt[3]{96} \approx 4.6 \) (e) \( 58 \div 89 \approx 0.7 \) (f) \( \sqrt{77} \approx 8.8 \) (g) \( 83 \div 11 \approx 7.5 \) (h) \( \frac{15}{23} \approx 0.7 \) (i) \( \sqrt[3]{72} \approx 4.2 \) (j) \( 14 \div 99 \approx 0.1 \) If you need help with anything else, feel free to ask!