加算|かさんkasan[0]heiban (flat)

1. na-adjective, noun, suru verb, transitive verbaddition; adding; supplement
   あなたの給与きゅうよは一定いっていの基本給きほんきゅうに販売手数料はんばいてすうりょうが加算かさんされます。↗

   You will be paid a stable base salary plus commissions on sale.

• Synonym足し算たしざんNeutralEveryday word for addition in arithmetic; 「加算」 is the more formal term, typically for adding on amounts such as fees or points.
• SynonymプラスNeutralColloquial loanword for plus or adding on, also a positive number; figuratively, a benefit or advantage.
• Synonym加えるくわえるNeutralVerb meaning to add or join something; broad in scope and not limited to numerical amounts.
• Synonym足すたすNeutralEveryday verb for adding numbers or topping something up; 「加算」 is essentially its formal noun form.
• Synonym追加ついかNeutralAdding something extra afterwards, as in 「追加注文」; stresses putting one more item on top.
• Synonym加え算くわえざんNeutralAnother word for addition, but old-fashioned and rarely heard today; say 「足し算」 instead.
• Synonym加法かほうWrittenWritten mathematical term for the operation of addition itself, as in textbooks; not used for adding on fees or charges.
• Synonym寄せ算よせざんNeutralOld-fashioned word for addition, found mainly in abacus contexts; rarely used today.
• Related増加ぞうかNeutralAn increase in quantity, stressing the trend of change; 「加算」 means adding a specific amount on top of something.
• Related合計ごうけいNeutralThe total or sum, stressing the result of adding everything up rather than adding one more item.
• Related増大ぞうだいWrittenWritten word for growth in scale or degree; about expansion, not arithmetic adding.
• RelatedましNeutralAn increase or markup, as in 「二割増し」; stresses being more than the original amount.
• Related合算がっさんNeutralCombining several items into one calculation, as in 「合算して請求する」; stresses merging them together.
• Related加増かぞうWrittenWritten word for an increase, historically a rise in stipend or fief; rare in modern use.
• Related増分ぞうぶんWrittenWritten term from maths and technology for an increment — the amount by which a value increases.
• Related増ぞうNeutralAn increase, used mostly in compounds or as a suffix, as in 「増収」 and 「三割増」.
• Antonym引き算ひきざんNeutralAntonym: everyday word for subtraction, the counterpart of 「足し算」 and 「加算」.
• Antonym減算げんざんNeutralAntonym: subtraction or deduction, the direct opposite of 「加算」, as in 「減算方式」.

Use 「加算」 for adding on charges, points or interest, as in 「延滞金を加算する」. For arithmetic addition say 「足し算」, for a grand total 「合計」, and for adding something extra 「追加」; the opposite operation is 「減算」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 数すうや量りょうを足し合たしあわせること。また、その足し合たしあわせたもの。