← Bab 2
Unit 23 · Selesaikan
1 / 1
Unit 23

Selesaikan

Kenal pasti apa yang diketahui dan perkara yang ditanya. Abaikan maklumat yang tidak diperlukan.

Selesaikan
Langkah 1

Fahami maklumat

Kenal pasti apa yang diketahui dan perkara yang ditanya. Abaikan maklumat yang tidak diperlukan.

diketahui → ditanya
Fahami maklumat = 理解资料
解应用题第一步是分清“已知”和“要问”。把题目里有用的数圈起来,再找出问句真正要你算什么。和问题无关的资料,例如日期或颜色,可以不理。
例子:“阿明有 48 支红笔和 25 支蓝笔,共几支?”48 + 25 = 73 支。
注意:题目里的资料不一定全部要用,先看问题再决定。
Fahami maklumat = Understand the information
The first step is to separate what you know from what is asked. Circle the useful numbers and find what the question really wants. Information that does not help, like a day or a colour, can be ignored.
Example: 'On Monday, Amin has 48 red pens and 25 blue pens. How many pens?' Monday is not needed: 48 + 25 = 73 pens.
Watch out: Not every piece of information must be used; read the question first.
Langkah 2

Pilih operasi

Lukis rajah atau model palang untuk melihat bahagian dan jumlah. Gunakan tambah untuk jumlah keseluruhan dan tolak untuk baki atau beza.

jumlahbahagian Abahagian Bbahagian Abahagian Bbeza
Pilih operasi = 选择运算
看清问句要的是什么。问“一共、总数”就用加法;问“还剩多少”或“相差多少”就用减法。先决定运算再动手,可以避免算错方向。
例子:甲班有 34 人,乙班有 29 人,甲班比乙班多几人?问相差,所以 34 − 29 = 5 人。
注意:“比较多几个”虽然有“多”字,却要用减法。
Pilih operasi = Choose the operation
Look at what the question asks for. A total, or how many altogether, means add. What is left, or the difference between two amounts, means subtract. Decide this before calculating.
Example: Class A has 34 pupils and Class B has 29. How many more pupils does Class A have? It asks for a difference: 34 − 29 = 5 pupils.
Watch out: 'How many more' contains the word 'more' but it needs subtraction.
Langkah 3

Kira dan semak

Tulis ayat matematik, kira dengan teliti, kemudian semak jawapan dalam konteks cerita.

rancang → kira → semak
Kira dan semak = 计算并检查
先写出算式,再用直式仔细计算。记得进位或退位。算完后把答案放回故事里想一想:剩下的数应该比原来少,总数应该比每一部分多。
例子:有 503 张贴纸,用了 168 张:503 − 168 = 335 张;检查 335 + 168 = 503,对了。
注意:答案要写上单位,例如“本”“张”。
Kira dan semak = Calculate and check
Write the number sentence, then calculate carefully in columns, remembering to regroup. After that, put the answer back into the story. What is left should be smaller than the start, and a total should be bigger than each part.
Example: There are 503 stickers and 168 are used: 503 − 168 = 335. Check: 335 + 168 = 503, correct.
Watch out: Write the unit after the answer, such as books or stickers.
Semak cepat · Soalan 1 / 2

Cuba sendiri

Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.

Perpustakaan mempunyai 235 buku cerita dan 146 buku maklumat. Berapakah jumlah buku?

Jumlah buku = 书的总数
题目问两种书一共几本,所以用加法。用直式计算:个位 5 + 6 满十,要向十位进 1,再加十位和百位。估算:应比 200 + 100 多一些。
例子:127 + 158:个位 7 + 8 = 15,写 5 进 1;十位 2 + 5 + 1 = 8;百位 1 + 1 = 2,得 285。
注意:个位满十后,十位一定要加上进来的 1。
Jumlah buku = Total number of books
The question asks for the total of two kinds of books, so add. In columns, 5 + 6 in the ones makes more than ten, so carry 1, then add the tens and hundreds. Estimate: a little more than 200 + 100.
Example: 127 + 158: 7 + 8 = 15, write 5 carry 1; 2 + 5 + 1 = 8; 1 + 1 = 2, giving 285.
Watch out: Add the carried 1 into the tens.
Semak cepat · Soalan 2 / 2

Cuba sendiri

Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.

Sebuah kedai ada 620 botol. Sebanyak 185 botol dijual. Berapakah baki?

Baki botol = 剩下的瓶子
卖掉后问还剩多少,所以用减法。个位 0 不够减 5,要向十位借;十位不够时再向百位借。算完用加法检查。
例子:400 − 136:借位后个位 10 − 6 = 4,十位 9 − 3 = 6,百位 3 − 1 = 2,得 264;检查 264 + 136 = 400。
注意:十位借给个位后,十位要减少 1。
Baki botol = Bottles left
The question asks how many bottles remain after some are sold, so subtract. The ones digit 0 is too small to take away 5, so regroup from the tens, and from the hundreds if needed. Check by adding.
Example: 400 − 136: after regrouping, ones 10 − 6 = 4, tens 9 − 3 = 6, hundreds 3 − 1 = 2, giving 264. Check: 264 + 136 = 400.
Watch out: After lending, the tens digit is one less.
Ringkasan

Syabas!

Kamu telah belajar tentang Selesaikan.

Ingat: fahami maklumat; pilih operasi; kira dan semak.

Buat latihan tambahan →