1Multiplication — the arithmetic operation of adding a number to itself a given number of times. Also called 乗法 (jōhō) in formal/mathematical contexts. Japanese children learn it in second grade through the 九九 (kuku, the multiplication table); the symbol is ×. Because the kanji 掛 only entered the jōyō list in 2010, elementary school textbooks still commonly write it as かけ算.
息子が掛け算の九九を覚え始めた。
My son has started memorizing the multiplication tables.
2×3の答えは、掛け算で6になる。
The answer to 2 times 3 is 6 in multiplication.
計算ミスをしないように、掛け算は何度も確認した。
I double-checked the multiplication so I wouldn't make a calculation error.
小学校2年生でかけ算を習います。
Multiplication is taught in second grade in elementary school.
面積は、たての長さと横の長さの掛け算で求められる。
Area is found by multiplying the length and the width.