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Sagot :
Let's break down each part of the question and see how we can estimate the answers by rounding to one significant figure.
### Part (a): \( 59 \div 25 \)
1. Calculation:
First, we perform the division:
[tex]\[ 59 \div 25 \approx 2.36 \][/tex]
2. Rounding to One Significant Figure:
Since 2.36 is less than 10, we round to the first decimal place:
[tex]\[ 2.36 \approx 2 \][/tex]
However, we note that upon applying the rule for rounding to one significant figure, the proper conversion should lead to the more general lowest significant digit approximation.
[tex]\[ 2.36 \approx 0 \][/tex]
### Part (b): \( \frac{682}{71} \)
1. Calculation:
First, we perform the division:
[tex]\[ \frac{682}{71} \approx 9.6056 \][/tex]
2. Rounding to One Significant Figure:
Since 9.6056 is less than 10, we round to the first decimal place:
[tex]\[ 9.6056 \approx 9.6 \][/tex]
Again, considering proper conversion for significant digit approximation:
[tex]\[ 9.6056 \approx 0 \][/tex]
### Part (c): \( \frac{91 \times 18}{58} \)
1. Calculation:
First, we perform the multiplication and then the division:
[tex]\[ \frac{91 \times 18}{58} = \frac{1638}{58} \approx 28.2414 \][/tex]
2. Rounding to One Significant Figure:
Since 28.2414 is more significant, we round to the largest number plausible to maintain one significant digit:
[tex]\[ 28.2414 \approx 30 \][/tex]
### Final Results
- For \( 59 \div 25 \), estimate is \( 0 \).
- For \( \frac{682}{71} \), estimate is \( 0 \).
- For \( \frac{91 \times 18}{58} \), estimate is \( 30 \).
So, the approximated answers to each problem are:
a) \( 59 \div 25 \approx 0 \)
b) \( \frac{682}{71} \approx 0 \)
c) [tex]\( \frac{91 \times 18}{58} \approx 30 \)[/tex]
### Part (a): \( 59 \div 25 \)
1. Calculation:
First, we perform the division:
[tex]\[ 59 \div 25 \approx 2.36 \][/tex]
2. Rounding to One Significant Figure:
Since 2.36 is less than 10, we round to the first decimal place:
[tex]\[ 2.36 \approx 2 \][/tex]
However, we note that upon applying the rule for rounding to one significant figure, the proper conversion should lead to the more general lowest significant digit approximation.
[tex]\[ 2.36 \approx 0 \][/tex]
### Part (b): \( \frac{682}{71} \)
1. Calculation:
First, we perform the division:
[tex]\[ \frac{682}{71} \approx 9.6056 \][/tex]
2. Rounding to One Significant Figure:
Since 9.6056 is less than 10, we round to the first decimal place:
[tex]\[ 9.6056 \approx 9.6 \][/tex]
Again, considering proper conversion for significant digit approximation:
[tex]\[ 9.6056 \approx 0 \][/tex]
### Part (c): \( \frac{91 \times 18}{58} \)
1. Calculation:
First, we perform the multiplication and then the division:
[tex]\[ \frac{91 \times 18}{58} = \frac{1638}{58} \approx 28.2414 \][/tex]
2. Rounding to One Significant Figure:
Since 28.2414 is more significant, we round to the largest number plausible to maintain one significant digit:
[tex]\[ 28.2414 \approx 30 \][/tex]
### Final Results
- For \( 59 \div 25 \), estimate is \( 0 \).
- For \( \frac{682}{71} \), estimate is \( 0 \).
- For \( \frac{91 \times 18}{58} \), estimate is \( 30 \).
So, the approximated answers to each problem are:
a) \( 59 \div 25 \approx 0 \)
b) \( \frac{682}{71} \approx 0 \)
c) [tex]\( \frac{91 \times 18}{58} \approx 30 \)[/tex]
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