Grade 3Math
DivisionCalculating to share equally
Division is the calculation we use when we share blocks equally. Let's learn how to write a division math sentence and how to check it with multiplication.
The narration and the pictures are in Japanese. You can hear the same words that are used in class at a Japanese school.
- Video
- 1:35（7 scenes）
- Problems
- 2 problems
Let's try
Write the math sentence in your notebook first, then open the answer.
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1If you share 15 blocks equally on 5 plates, how many go on each plate? Write the math sentence too.
Hint
Try handing them out to the 5 plates one at a time, in turn. It is easier to see if you try with marbles.
Answer
The math sentence is 15 ÷ 5 = 3, and the answer is 3 on each plate. You can check with 3 × 5 = 15.
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2If you put 18 blocks on plates, 9 on each, how many plates can you fill? Write the math sentence too.
Hint
Which fact in the 9 times table has the answer 18?
Answer
The math sentence is 18 ÷ 9 = 2, and the answer is 2 plates. You can check with 9 × 2 = 18.
Words in this lesson
- division わり算
- The calculation we use when we share equally. It is shown with the sign "÷".
- divided by ÷
- The sign that shows division.
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).
- Division includes finding "how many for one person" and finding "how many people can get a share," and both can be shown with a division math sentence. When sharing snacks, try thinking together about which case it is.
- The answer to a division can be checked with the multiplication times tables. Saying "Let's go back with multiplication" when your child finds an answer helps build the habit of checking calculations.