multiply

掛ける

三かける四のように、ある数に別の数を掛けて計算する。

やさしい英語で： To calculate a number times another number, such as three times four.

• Multiply four by three.
• She multiplied the price by the number of tickets.
• What do you get if you multiply seven by eight?

使い方： multiply A by B (Multiply six by five to get thirty.)

反対語： divide

よく使う表現： multiply by ten, multiply two numbers, multiply by something

増える、増やす

数が大きく増える、または何かの数を大きく増やす。

やさしい英語で： To become much greater in number, or make something much greater in number.

• Our problems began to multiply.
• The costs multiplied as the project grew.
• Poor communication can multiply the difficulties.

類義語： increase, grow

反対語： decrease

よく使う表現： problems multiply, multiply rapidly, multiply the risk

繁殖する、増殖する

子や同じ種類の新しい生き物を生み出す。

やさしい英語で： To produce young or new living things of the same kind.

• Bacteria multiply quickly in warm food.
• The rabbits multiplied until the island was crowded.
• These cells can multiply without any help.

類義語： reproduce, breed

よく使う表現： bacteria multiply, multiply rapidly, cells multiply