Grade 3Math
Finding Times and Amounts of TimeThe time ... minutes later, how long it took, and seconds
We think about "What time is it ... minutes later?" and "How many minutes did it take?" by looking at how the long hand of the clock moves. If you split it at the o'clock time, it is easy to find.
The narration and the pictures are in Japanese. You can hear the same words that are used in class at a Japanese school.
- Video
- 1:24（6 scenes）
- Problems
- 2 problems
Open this lesson in Japanese（時こくと時間のもとめ方）
Let's try
Write the math sentence in your notebook first, then open the answer.
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1What time is it 30 minutes after 7:50?
Hint
First, think about how many minutes it is until 8 o'clock.
Answer
It is 8:20. Split it into 10 minutes until 8 o'clock and the other 20 minutes.
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2How many seconds are in 1 minute?
Hint
1 hour is 60 minutes. It is the same number.
Answer
60 seconds.
Words in this lesson
- time (a point in time) 時こく
- One point in the flow of time (such as 8:40).
- amount of time 時間
- The length from one point in time to another (such as 20 minutes).
- second 秒
- A unit of time shorter than 1 minute. 1 minute is 60 seconds.
For parents and guardians
- The names of lessons and the order of topics differ slightly between textbooks. This page follows the content of Japan's national curriculum guidelines (the Course of Study).
- To find the time "... minutes later," it is easier to split it once at the o'clock time (such as 9 o'clock). Try calculating together using real plans, such as the time you leave home and the time you arrive.
- Seconds become familiar when your child feels "How long is 10 seconds?" with a kitchen timer or a stopwatch.