暗(あん)算(ざん)

彼(かれ)は暗(あん)算(ざん)をするほど頭(あたま)が良(よ)くない。

• He doesn't have enough brains to do sums in his head.
• He isn't smart enough to do mental arithmetic.

トムは暗(あん)算(ざん)が得(とく)意(い)だよ。

• Tom is good at mental math.

暗(あん)算(ざん)が出(で)来(き)るほど彼(かれ)は賢(かしこ)くはない。

• He's not smart enough to do math in his head.

彼(かれ)は暗(あん)算(ざん)が出(で)来(き)るほど頭(あたま)が良(よ)くない。

• He doesn't have enough brains to do sums in his head.
• He isn't smart enough to add up numbers in his head.

いや算(そろ)盤(ばん)やってるから暗(あん)算(ざん)得(とく)意(い)なのかと思(おも)って。

• No, I just thought that since you can use an abacus, you might be good at doing calculations in your head.

彼(かれ)は暗(あん)算(ざん)が出(で)来(き)るほどの頭(ず)脳(のう)を持(も)ち合(あ)わせていない。

• He doesn't have enough brains to do sums in his head.
• He isn't smart enough to add up numbers in his head.

計(けい)算(さん)力(りょく)を向(こう)上(じょう)させるために暗(あん)算(ざん)を練(れん)習(しゅう)する。

英(えい)訳(やく)はまだありません。