Question
Ecris le nombre à une seule décimale qui précède et celui qui suit chaque nombre ci-dessous. Dans chaque cas, entoure celui qui est le plus près du nombre au centre. a) underline ( )lt 58,49lt underline ( ) b) underline ( )lt -98,34lt underline ( ) d) underline ( )lt -7,869lt underline ( ) C) underline ( )lt 1,684lt underline ( )
Solution
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SandraElite · Tutor for 8 years
Answer
### a) $58.4 \lt 58.49 \lt \boxed{58.5}$<br />### b) $-98.4 \lt -98.34 \lt \boxed{-98.3}$<br />### d) $-7.9 \lt -7.869 \lt \boxed{-7.9}$<br />### c) $1.6 \lt 1.684 \lt \boxed{1.7}$
Explain
## Step 1: Identifying the surrounding numbers to one decimal place for 58.49<br />### We need to find the numbers with one decimal place that are immediately less than and greater than 58.49. These are 58.4 and 58.5. Since 58.49 is closer to 58.5, we circle 58.5.<br /><br />## Step 2: Identifying the surrounding numbers to one decimal place for -98.34<br />### We need to find the numbers with one decimal place that are immediately less than and greater than -98.34. These are -98.4 and -98.3. Since -98.34 is closer to -98.3, we circle -98.3. Remember on the negative side, the smaller the absolute value, the larger the number.<br /><br />## Step 3: Identifying the surrounding numbers to one decimal place for -7.869<br />### We need to find the numbers with one decimal place that are immediately less than and greater than -7.869. These are -7.9 and -7.8. Since -7.869 is closer to -7.9, we circle -7.9.<br /><br />## Step 4: Identifying the surrounding numbers to one decimal place for 1.684<br />### We need to find the numbers with one decimal place that are immediately less than and greater than 1.684. These are 1.6 and 1.7. Since 1.684 is closer to 1.7, we circle 1.7.
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