Kumpulan rujukan = Reference group To estimate, start with a group whose amount you know. One tray holds about 50 beads, so two nearly full trays hold about 50 + 50 = 100 beads. Example: One bag holds about 20 sweets. Three nearly full bags hold about 20 + 20 + 20 = 60 sweets. Watch out: Get the reference amount right first, or every estimate will be off.
Langkah 2
Banding saiz dan kepadatan
Bekas yang lebih besar atau lebih penuh biasanya mengandungi lebih banyak objek.
kurang · hampir · lebih
Saiz dan kepadatan = 大小和满不满 比较两个容器时，要看大小，也要看装得多满。比较大的、或者装得比较满的容器，通常东西比较多。 例子：两个一样大的罐子，一个装满弹珠，一个只装一半，装满的那个弹珠大约是另一个的 2 倍。 注意：大容器如果几乎是空的，东西可能比装满的小容器还少。
Saiz dan kepadatan = Size and fullness When comparing containers, look at both the size and how full each one is. A bigger or fuller container usually holds more objects. Example: Two jars are the same size. One is full of marbles and one is half full, so the full jar has about twice as many. Watch out: A big box that is almost empty can hold fewer things than a small box that is full.
Langkah 3
Anggaran bukan kiraan tepat
Gunakan perkataan lebih kurang, kurang daripada atau lebih daripada.
≈ bukan =
Anggaran bukan kiraan tepat = 估计不是精确数 估计只是接近的数，所以要说“大约”“少于”或“多于”，马来文用 lebih kurang 等词。符号用 ≈，不用 =。 例子：一排大约 10 人，4 排大约有 40 人，写成 ≈ 40。 注意：不要把估计说成“刚好”，估计的答案不是准确数。
Anggaran bukan kiraan tepat = An estimate is not an exact count An estimate is a close number, so we use words like lebih kurang (about), kurang daripada (less than) or lebih daripada (more than). We write ≈, not =. Example: A row has about 10 children, so 4 rows have about 40 children, written ≈ 40. Watch out: Do not call an estimate exact.
Semak cepat · Soalan 1 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Satu bekas rujukan mengandungi 100 manik. Bekas kedua kelihatan separuh penuh. Anggaran munasabah ialah…
Anggaran munasabah = Sensible estimate The reference container holds 100 beads, and the second one looks half full. Think about what half of 100 is, and whether the answer should say about or exactly. Example: A full jar holds 60 sweets and another jar is half full, so it holds about 30, since 60 ÷ 2 = 30. Watch out: A quick look cannot give an exact count, so the words in each choice matter as much as the number.
Semak cepat · Soalan 2 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Dulang A ada 40 epal. Dulang B kelihatan dua kali lebih penuh. Anggaran B ialah…
Dua kali lebih penuh = 两倍满 托盘 A 有 40 个苹果，托盘 B 看起来是 A 的两倍满。先算 40 的两倍大约是多少，再想想答案该用“大约”还是“刚好”。 例子：一篮有 25 个橙，另一篮看起来两倍满，估计大约 25 + 25 = 50 个。 注意：“两倍”是再加上同样多，不是减少一半。
Dua kali lebih penuh = Twice as full Tray A has 40 apples and tray B looks twice as full. Work out about how much double 40 is, then decide whether the answer should say about or exactly. Example: One basket has 25 oranges and another looks twice as full, so it has about 25 + 25 = 50. Watch out: Twice means the same amount again, not half.
Ringkasan
Syabas!
Kamu telah belajar tentang Anggar Nombor.
Ingat: gunakan kumpulan rujukan; banding saiz dan kepadatan; anggaran bukan kiraan tepat.
