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