Akal Pintar

分两步除 = bahagi dua langkah 除以 36 就等于先除以 9、再除以 4，因为 9 × 4 = 36。已经知道先除以 9 的结果是 2 040，所以只要再算 2 040 ÷ 4 = 510。可以用 510 × 36 = 18 360 验算。 例子：已知 4 200 ÷ 7 = 600，求 4 200 ÷ 14 → 600 ÷ 2 = 300。 注意：是再除以 4，不是乘以 4。

divide in two steps = bahagi dua langkah Dividing by 36 is the same as dividing by 9 and then by 4, because 9 × 4 = 36. We already know that dividing by 9 gives 2 040, so we only need 2 040 ÷ 4 = 510. Check: 510 × 36 = 18 360. Example: since 4 200 ÷ 7 = 600, 4 200 ÷ 14 = 600 ÷ 2 = 300. Watch out: divide by 4 again; do not multiply by 4.

除数变成几倍 = pembahagi menjadi beberapa kali ganda 被除数没有变，只是除数变大了。先找出新除数是旧除数的几倍，再把已知的商除以这个倍数，就得到新的商。最后用“新商 × 新除数”检查是否回到被除数。 例子：已知 4 800 ÷ 6 = 800，那么 4 800 ÷ 12 = 800 ÷ 2 = 400。 注意：除数变大，商要变小，不能把商乘上那个倍数。

the divisor becomes some times bigger = pembahagi menjadi beberapa kali ganda The number being divided stays the same; only the divisor is bigger. Find how many times bigger the new divisor is, then divide the known answer by that number to get the new answer. Check with new answer × new divisor. Example: since 4 800 ÷ 6 = 800, 4 800 ÷ 12 = 800 ÷ 2 = 400. Watch out: a bigger divisor gives a smaller answer, so do not multiply the answer by that number.