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Unit 30 · Bina Sifir Bahagi
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Unit 30

Bina Sifir Bahagi

Jika 6 × 4 = 24, maka 24 ÷ 6 = 4 dan 24 ÷ 4 = 6.

Bina Sifir Bahagi
Langkah 1

Darab dan bahagi berkaitan

Jika 6 × 4 = 24, maka 24 ÷ 6 = 4 dan 24 ÷ 4 = 6.

6 × 4 = 24 ↔ 24 ÷ 6 = 4
Darab dan bahagi berkaitan = 乘除互相关联
一个乘法事实可以变出两个除法事实。6 × 4 = 24,所以 24 ÷ 6 = 4,24 ÷ 4 = 6。三个数是一家人:24 是最大的数,放在除号前面。
例子:3 × 7 = 21,所以 21 ÷ 3 = 7,21 ÷ 7 = 3。
注意:写除法时最大的数要放在最前面,不能写成 4 ÷ 24。
Darab dan bahagi berkaitan = Multiplication and division are linked
One multiplication fact gives two division facts. Since 6 × 4 = 24, we know 24 ÷ 6 = 4 and 24 ÷ 4 = 6. The three numbers form a family, and the biggest one goes first in a division.
Example: 3 × 7 = 21, so 21 ÷ 3 = 7 and 21 ÷ 7 = 3.
Watch out: The biggest number goes first; writing 4 ÷ 24 is not the same.
Langkah 2

Gunakan sifir yang tepat

Untuk 42 ÷ 7, cari fakta sifir 7 yang menghasilkan 42.

6 × 7 = 42 → 42 ÷ 7 = 6
Sifir yang tepat = 用对乘法表
除数是 7,就用 7 的乘法表。算 42 ÷ 7 时,顺着数:7、14、21、28、35、42。42 是第六个,所以 6 × 7 = 42,42 ÷ 7 = 6。除法可以想成乘法倒过来,找出哪一个数乘除数会刚好等于被除数。
例子:32 ÷ 8:8 的乘法表 8、16、24、32,32 是第四个,所以 32 ÷ 8 = 4。
注意:要用除数的乘法表,用错表就找不到答案。
Sifir yang tepat = Use the right table
For 42 ÷ 7, use the table of 7, the divisor. Count along it: 7, 14, 21, 28, 35, 42. Forty-two is the sixth number, so 6 × 7 = 42 and 42 ÷ 7 = 6.
Example: 32 ÷ 8: the table of 8 goes 8, 16, 24, 32; 32 is the fourth, so 32 ÷ 8 = 4.
Watch out: Use the table of the divisor; another table will not help.
Langkah 3

Semak tiga nombor

Pastikan nombor asal, pembahagi dan jawapan membentuk fakta darab yang betul. Pada garis nombor, 15 ÷ 3 = 5 ialah lima lompatan 3 ke belakang. Bahagi juga boleh ditulis dalam bentuk lazim.

151296301234515 ÷ 3 = 55 × 3 = 15
Semak tiga nombor = 检查三个数
除法里的原来的数、除数和答案要能组成正确的乘法:答案 × 除数 = 原来的数。只要这个乘法不对,除法答案就一定错了。这样检查只需要一步乘法。
例子:30 ÷ 5 = 6,检查 6 × 5 = 30,三个数配得上。
注意:乘回去比原来的数大,答案要改小;比原来的数小,答案要改大。
Semak tiga nombor = Check the three numbers
In a division, the starting number, the divisor and the answer must make a true multiplication: answer × divisor = starting number. If that multiplication is wrong, the division answer is wrong too. This check takes just one multiplication.
Example: 30 ÷ 5 = 6. Check: 6 × 5 = 30, so the three numbers fit.
Watch out: If the check is too big, make the answer smaller; if too small, make it bigger.
Semak cepat · Soalan 1 / 2

Cuba sendiri

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

24 ÷ 6 = __

Bahagi dengan 6 = 除以 6
题目问 24 ÷ 6,意思是 24 平均分成 6 份,每份是多少。也可以想“几乘 6 等于 24”。用 6 的乘法表往上数:6、12、18,一直数到 24,看看数了几次。
例子:18 ÷ 6 = 3,因为 6、12、18 数了三次。
注意:数次数时 6 本身就是第一次,不要把起点 0 也算进去。
Bahagi dengan 6 = Divide by 6
The question asks for 24 ÷ 6, which shares 24 into 6 equal parts. You can also ask what number times 6 makes 24. Count up the table of 6: 6, 12, 18 and onward, and see how many steps it takes to reach 24.
Example: 18 ÷ 6 = 3, because 6, 12, 18 is three steps.
Watch out: The first step is 6 itself; do not count the starting zero as a step.
Semak cepat · Soalan 2 / 2

Cuba sendiri

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

35 ÷ 5 = __

Bahagi dengan 5 = 除以 5
题目问 35 ÷ 5,要找“几乘 5 等于 35”。可以用 5 的乘法表跳数:5、10、15、20、25、30、35,数一数一共说了几个数。35 的个位是 5,所以它一定在 5 的乘法表里。
例子:40 ÷ 5 = 8,因为 8 × 5 = 40。
注意:跳数时一个数都不能漏,漏一个就少算一次。
Bahagi dengan 5 = Divide by 5
The question asks for 35 ÷ 5, so find what number times 5 makes 35. Skip count in fives: 5, 10, 15, 20, 25, 30, 35, and count how many numbers you said. Multiples of 5 end in 0 or 5, so 35 is in the table of 5.
Example: 40 ÷ 5 = 8, because 8 × 5 = 40.
Watch out: Do not skip any number while counting, or you will be one step short.
Ringkasan

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Ingat: darab dan bahagi berkaitan; gunakan sifir yang tepat; semak tiga nombor.

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