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Telling Time

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Telling Time


1. Stating the problems. I will answer four problems from your worksheet: question 6 (read a clock), question 7 (how to say times), question 8 (place value in 540), and question 9 (use a doubles fact for 7 + 8). 2. Formula and important rules. To read minutes on an analog clock, multiply the minute-hand number by $5$ to get minutes past the hour. Each numeral on the clock represents $5$ minutes. When the minute hand points to $6$ that is half past because $6\times 5=30$ minutes. The place-value rule: a digit in the hundreds place represents the digit times $100$. A doubles strategy: use a known fact like $n+n$ and adjust by $1$ when adding $n+(n+1)$. 3. Solution for question 6. Read the clock: the minute hand on the $8$ means $8\times 5=40$ minutes past the hour. If the hour hand is slightly before $5$, the time is $4:40$. Among the multiple-choice options listed (20 minutes past 11, 25 minutes past 11, half past 11), none match a clock that reads $4:40$. Therefore the correct time for the described clock is $4:40$. 4. How to say the time (fill the blanks). Use the phrase "$m$ minutes after $h$" to say $h:$mm when minutes are not $30$. Examples corresponding to the three choice formats are: $20$ minutes after $11$. $25$ minutes after $11$. half past $11$ which means $11:30$. 5. Solution for question 8 (place value). In the number $540$ the digit $5$ is in the hundreds place, so its value is $5\times 100 = 500$. Therefore the value of the digit $5$ is $500$. 6. Solution for question 9 (doubles fact and sum). We want $7+8$. Use the doubles fact $7+7=14$ and then add $1$ to get $7+8 = 7+7+1 = 14+1 = 15$. Doubles fact: $7+7=14$. So $7+8=15$. 7. Final answers. Q6: $4:40$ (none of the listed 11:20, 11:25, 11:30 choices match). Q7: fills: "$20$ minutes after $11$", "$25$ minutes after $11$", half past $11$. Q8: $500$. Q9: doubles fact $7+7=14$ and sum $15$.