addition

足し算、加算

二つ以上の数を合わせて、その合計を求めること。

やさしい英語で： Finding the total when two or more numbers are put together.

• We learned addition at school.
• This addition problem has three numbers.
• Can you check my addition?

類義語： adding

反対語： subtraction

よく使う表現： simple addition, addition problem, addition and subtraction

追加、添加

すでにあるものに、さらに別のものを加えること。

やさしい英語で： The act of putting something extra into or with something else.

• The addition of salt improves the flavor.
• Their addition to the team changed everything.
• The recipe requires the slow addition of water.

使い方： the addition of something to something (The addition of milk to the sauce makes it smoother.)

類義語： adding

反対語： removal

よく使う表現： addition of something, with the addition, addition to something

追加物、増築部分

すでにあるものに新しく加わった物や人。

やさしい英語で： A new thing or person that becomes part of something already there.

• The puppy is a welcome addition to our family.
• They built an addition onto the house.
• These books are recent additions to the collection.

使い方： an addition to something (The library is a useful addition to the school.)

類義語： extra, extension

よく使う表現： new addition, welcome addition, addition to something