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Unit 25 · Bina Sifir Darab
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Unit 25

Bina Sifir Darab

Sifir 4 dibina dengan membilang 4, 8, 12, 16 dan seterusnya, seperti lompatan 4 pada garis nombor. Fakta darab juga boleh ditulis dalam bentuk lazim.

Bina Sifir Darab
Langkah 1

Bilang mengikut gandaan

Sifir 4 dibina dengan membilang 4, 8, 12, 16 dan seterusnya, seperti lompatan 4 pada garis nombor. Fakta darab juga boleh ditulis dalam bentuk lazim.

04812161 × 42 × 43 × 44 × 44× 416
Bilang mengikut gandaan = 按倍数数数
建立乘法表可以用跳数。4 的乘法表就是每次多数 4:4、8、12、16、20。第几个数就是几乘 4,例如第三个数 12 就是 3 × 4。
例子:3 的乘法表:3、6、9、12、15,第五个数 15 = 5 × 3。
注意:跳数时每一步都要加同样的数,中间漏掉一个,后面全错。
Bilang mengikut gandaan = Count in multiples
We can build a times table by skip counting. The table of 4 goes up by 4 each time: 4, 8, 12, 16, 20. The position tells you what to multiply by, so the third number, 12, is 3 × 4.
Example: The table of 3: 3, 6, 9, 12, 15. The fifth number is 15 = 5 × 3.
Watch out: Add the same amount at every step; skipping one number makes the rest wrong.
Langkah 2

Gunakan fakta yang diketahui

Jika 5 × 6 = 30, maka 6 × 5 juga 30.

5 × 6 = 6 × 5 = 30
Fakta yang diketahui = 已知的乘法事实
已经会的乘法可以帮你算新的题目。知道 5 × 6 = 30,就知道 6 × 5 也是 30,因为两个数对调,乘积不变。这样要背的乘法表就少了差不多一半。
例子:知道 2 × 9 = 18,所以 9 × 2 = 18。
注意:只有乘法可以这样对调来用,减法对调后答案就不一样了。
Fakta yang diketahui = Known facts
A fact you already know can help with a new one. If 5 × 6 = 30, then 6 × 5 is also 30 because swapping the numbers keeps the product the same. This means you only need to learn about half of the times tables.
Example: Knowing 2 × 9 = 18 tells you that 9 × 2 = 18.
Watch out: This swapping trick works for multiplication, but not for subtraction.
Langkah 3

Cari pola jawapan

Setiap jawapan dalam satu sifir bertambah dengan nombor yang sama.

+7 · +7 · +7
Pola jawapan = 答案的规律
同一个乘法表里,每个答案都比前一个多同样的数。7 的乘法表每次加 7:7、14、21、28。如果忘了 5 × 7,可以从 4 × 7 = 28 再加 7,得 35。
例子:9 的乘法表:9、18、27、36,每次加 9,所以 5 × 9 = 36 + 9 = 45。
注意:用规律往下算时,要从正确的前一个答案开始加。
Pola jawapan = Answer pattern
In a times table, each answer grows by the same amount. The table of 7 grows by 7: 7, 14, 21, 28. If you forget 5 × 7, start from 4 × 7 = 28 and add 7 to get 35.
Example: The table of 9: 9, 18, 27, 36. Each step adds 9, so 5 × 9 = 36 + 9 = 45.
Watch out: When you use the pattern, start from a correct earlier answer.
Semak cepat · Soalan 1 / 2

Cuba sendiri

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

7 × 2 = __

Sifir darab = 乘法表
题目问 7 × 2,意思是 7 组、每组 2 个。把它对调成 2 × 7,就是 7 + 7,比较容易算。也可以两个两个地跳数,跳七次,看看结果是否相同。
例子:8 × 2 = 2 × 8 = 8 + 8 = 16。
注意:乘以 2 是把数变成两倍,不是在数字上加 2。
Sifir darab = Times table
The question asks for 7 × 2, which means seven groups of two. It is easier to swap it to 2 × 7, which is 7 + 7. You can also skip count by twos seven times and see if you land on the same number.
Example: 8 × 2 = 2 × 8 = 8 + 8 = 16.
Watch out: Multiplying by 2 doubles the number; it does not just add 2 to it.
Semak cepat · Soalan 2 / 2

Cuba sendiri

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

6 × 3 = __

Hasil darab = 乘积
6 × 3 表示 6 组、每组 3 个。可以每次加 3、加六次,也可以对调成 3 × 6,算 6 + 6 + 6:先算 6 + 6 = 12,再加 6。两种方法的结果应该一样,可以互相检查。
例子:4 × 3 = 3 × 4 = 4 + 4 + 4 = 12。
注意:连加时要数清楚一共加了几个数,少加一个就差一整组。
Hasil darab = Product
6 × 3 means six groups of three. You can count by threes six times, or swap it to 3 × 6 and work out 6 + 6 + 6: first 6 + 6 = 12, then add one more 6. Each way checks the other.
Example: 4 × 3 = 3 × 4 = 4 + 4 + 4 = 12.
Watch out: Count how many numbers you add; missing one leaves out a whole group.
Ringkasan

Syabas!

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Ingat: bilang mengikut gandaan; gunakan fakta yang diketahui; cari pola jawapan.

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