Unit 24
Kenal Anu Lagi
Sebuah feri membuat 4 perjalanan. Setiap perjalanan membawa bilangan penumpang yang sama. Feri itu membawa 240 orang penumpang semuanya.
Anu ialah bilangan penumpang dalam satu perjalanan.
4 × = 240
乘除里的未知数 = anu dalam darab dan bahagi
乘法和除法的算式里，也可能有一个不知道的数（anu），我们可以用 □，也可以用 ▲、★ 等符号代表它。先读懂故事，找出哪一个数没有给，再按故事的次序写出算式。
例子：3 个书架放的玩具一样多，一共 90 个 → 每个书架的玩具是 anu → 3 × ★ = 90。
注意：“每一个一样多”通常和乘法、除法有关。
unknowns in multiplication and division = anu dalam darab dan bahagi
Multiplication and division sentences can also have an unknown number (anu), shown by □ or by a symbol such as ▲ or ★. Read the story, find the number that is not given, then write the sentence in the order of the story.
Example: 3 shelves hold the same number of toys, 90 in all → toys per shelf is the anu → 3 × ★ = 90.
Watch out: 'each has the same' usually points to multiplication or division.
Cari anu
Anu dalam darab
★ × 10 = 350 · 4 × □ = 240
★ × 10 = 350
★ = 350 ÷ 10 = 35
4 × 60 = 240
用除法求 = cari dengan bahagi
★ × 10 = 350：想“多少乘 10 等于 350？”，也就是 350 ÷ 10 = 35，★ 只是代替那个数的符号。4 × □ = 240：240 ÷ 4 = 60（24 个十 ÷ 4 = 6 个十），所以每趟载 60 人。检查：4 × 60 = 240 ✔。
例子：3 × ▲ = 90 → 90 ÷ 3 = 30。
注意：乘法里不知道其中一个因数，就用除法去找。
use division to find it = cari dengan bahagi
★ × 10 = 350: think 'what times 10 makes 350?', which is 350 ÷ 10 = 35; ★ just stands for that number. 4 × □ = 240: 240 ÷ 4 = 60 (24 tens ÷ 4 = 6 tens), so each trip carries 60 people. Check: 4 × 60 = 240 ✔.
Example: 3 × ▲ = 90 → 90 ÷ 3 = 30.
Watch out: when one number in a multiplication is unknown, divide to find it.
Anu dalam bahagi
□ ÷ 2 = 45 · 42 ÷ □ = 6
90 ÷ 2 = 45
42 ÷ 7 = 6
除法里的未知数 = anu dalam bahagi
□ ÷ 2 = 45：一个数平分成 2 份，每份 45，原来的数 = 45 × 2 = 90。42 ÷ □ = 6：42 平分成几份，每份 6？用 42 ÷ 6 = 7，所以 anu = 7（6 × 7 = 42）。
例子：▲ ÷ 3 = 20 → 60；30 ÷ ★ = 10 → 3。
注意：求被除数用乘法，求除数用除法。
unknowns in division = anu dalam bahagi
□ ÷ 2 = 45: a number shared into 2 gives 45 each, so the number is 45 × 2 = 90. 42 ÷ □ = 6: 42 shared into how many groups gives 6 each? 42 ÷ 6 = 7, so the anu is 7 (6 × 7 = 42).
Example: ▲ ÷ 3 = 20 → 60; 30 ÷ ★ = 10 → 3.
Watch out: multiply to find a missing number divided; divide to find a missing divisor.
Kenal pasti anu
Pak Leong mengisi 30 biji durian ke dalam beberapa buah bakul. Setiap bakul ada 6 biji. Apakah anu?
认出未知数 = kenal pasti anu
故事里已经知道：一共 30 个榴莲，每篮 6 个。不知道的是“有几个篮子”，这就是 anu。算式：30 ÷ □ = 6，□ = 5。
例子：“一些袋子，每袋 5 个，共 40 个” → anu 是袋子数目。
注意：题目给了的数不是 anu。
identify the unknown = kenal pasti anu
The story tells us there are 30 durians and each basket holds 6. What we do not know is how many baskets there are; that is the anu. Sentence: 30 ÷ □ = 6, so □ = 5.
Example: 'some bags, 5 in each, 40 in all' → the anu is the number of bags.
Watch out: numbers the story gives are not the anu.
Tulis ayat matematik
Sebuah kedai roti membakar beberapa biji roti. Roti itu dihantar sama banyak ke 6 buah kedai runcit. Setiap kedai mendapat 35 biji. Ayat matematik manakah betul?
写算式 = tulis ayat matematik
面包的总数不知道（▲），平均送到 6 间杂货店（÷ 6），每间 35 个（= 35）→ ▲ ÷ 6 = 35。这里用 ▲ 代替 □，意思一样。
例子：“一些饼干平分给 4 人，每人 30 块” → ★ ÷ 4 = 30。
注意：总数不知道时，符号写在除号前面。
write the number sentence = tulis ayat matematik
The total number of buns is unknown (▲), sent equally to 6 shops (÷ 6), 35 each (= 35) → ▲ ÷ 6 = 35. ▲ is used instead of □; it means the same.
Example: 'some biscuits shared by 4 people, 30 each' → ★ ÷ 4 = 30.
Watch out: when the total is unknown, the symbol goes before the ÷ sign.
Cari anu
▲ ÷ 6 = 35. Berapakah nilai ▲?
求被除数 = cari nombor yang dibahagi
▲ ÷ 6 = 35，原来的数 = 35 × 6：个位 6×5=30，写 0 进 3；十位 6×3=18，+3 = 21 → 210。检查：210 ÷ 6 = 35 ✔。所以面包店一共烤了 210 个面包。
例子：★ ÷ 10 = 7 → 70。
注意：41 是 35 + 6，29 是 35 − 6，都用错了运算。
find the number divided = cari nombor yang dibahagi
▲ ÷ 6 = 35, so the number is 35 × 6: ones 6×5=30, write 0 carry 3; tens 6×3=18, +3 = 21 → 210. Check: 210 ÷ 6 = 35 ✔. The bakery baked 210 buns.
Example: ★ ÷ 10 = 7 → 70.
Watch out: 41 is 35 + 6 and 29 is 35 − 6; both use the wrong operation.
Ringkasan
Syabas!
× ↔ ÷
Untuk mencari anu dalam darab, bahagi. Untuk mencari nombor yang dibahagi, darab.
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