Explore 倍 through comparisons of quantities and changes over time.
The idea
倍 has 10 strokes and is normally read ばい. A number before 倍 gives a multiplication factor: 二倍 is twice the reference quantity. 倍増 means to double.
Examples
- このかばんはあのかばんの二倍の重さです。This bag is twice as heavy as that one.
- 価格は去年の二倍です。The price is twice what it was last year.
- 利用者の数が倍増しました。The number of users doubled.
- この道はあの道の三倍の長さです。This road is three times as long as that one.
- レシピの二倍の量を作ってください。Please make the recipe twice the amount.
- 人口は十年で五倍に増えました。The population has increased fivefold in ten years.
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Watch out
二倍 means twice the original amount, not an increase of two times the original amount. Identify the reference quantity before comparing.
Try it yourself
Write the reading of 二倍 in hiragana.
Show answer or example answer
にばい
二倍 is read にばい: the price is twice last year’s price.
Write the reading of 倍増 in hiragana.
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ばいぞう
倍増 is read ばいぞう: the number of users doubled.
Choose the missing kanji: 三＿（さんばい）［倍／陪］.
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倍
倍 completes 三倍, read さんばい: the distance is three times as long.
Practice round
Answer questions, then rebuild Japanese sentences where available. We keep your score.
Write the reading of 二倍 in hiragana.
Write the reading of 倍増 in hiragana.
Choose the missing kanji: 三＿（さんばい）［倍／陪］.
Tap the words in the right order.
Tap the words in the right order.
Tap the words in the right order.
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Write 倍 using the linked stroke diagram, then compare two quantities using 二倍.