Unit 11
Cabar Minda
Aina dan Ben mewarnakan bahagian yang sama pada petak 100.
Aina menulis 0.3. Ben menulis 0.30.
Siapakah yang betul?
思考题 = cabar minda
两个人涂了同样的格子，却写出两个不同的小数。要判断谁对，先数涂了几整行：每一整行是十分之一，也是 10 个百分之一。再想一想，一位小数和两位小数能不能表示同样的大小。
例子：涂 2 整行，可以写成 0.2，也可以写成 20/100。
注意：小数点后的位数不同，不一定表示大小不同。
brain challenge = cabar minda
Two children coloured the same squares but wrote two different decimals. To decide who is right, count the full rows first: each full row is one tenth, which is also 10 hundredths. Then think about whether a one-place and a two-place decimal can show the same amount.
Example: 2 full rows can be written 0.2 or 20/100.
Watch out: a different number of digits after the point does not always mean a different value.
Jawapan
Kedua-duanya betul
3 persepuluh = 30 perseratus
0.3 = 0.30 = 30100
3 baris × 10 petak = 30 petak
十分之几 = persepuluh
一整行有 10 格，是 100 格的十分之一。涂了 3 整行，就是 3 个十分之一，写成 0.3；数格子是 30 格，写成 0.30 或 30/100。所以 Aina 和 Ben 都对。
例子：涂 5 整行 → 0.5 = 0.50 = 50/100。
注意：在 3 后面添 0，大小不变；在 3 前面加 0 写成 0.03，就只剩 3 格了。
tenths = persepuluh
One full row has 10 squares, which is one tenth of the 100 squares. Three full rows are 3 tenths, written 0.3; counting the squares gives 30, written 0.30 or 30/100. So Aina and Ben are both right.
Example: 5 full rows → 0.5 = 0.50 = 50/100.
Watch out: a 0 after the 3 changes nothing, but writing 0.03 puts the 3 in the hundredths and leaves only 3 squares.
Cuba ini
Kad tertulis 0.4. Berapakah petak yang perlu diwarnakan?
涂几行 = berapa baris
小数点后只有一位数时，这个数字在十分位，表示有几个十分之一，也就是要涂几整行。每行 10 格，再乘出总格数。
例子：0.7 → 7 整行 → 70 格。
注意：十分位的数字不是小格的数目，只涂几小格是常见的错。
how many rows = berapa baris
When there is only one digit after the point, that digit is in the tenths place and tells how many tenths, which is how many full rows to colour. Each row has 10 squares, so multiply to find the squares.
Example: 0.7 → 7 full rows → 70 squares.
Watch out: the tenths digit is not a count of single squares; colouring only a few small squares is a common slip.
Apakah yang salah?
Semak dan betulkan
Kerja Darren
4100 = 0.04 ✓
检查与改正 = semak dan betulkan
检查小数看两件事：① 个位：分母是 100、分子小于 100 的分数都小于 1，所以个位是 0；② 数位：只有几格时，数字写在百分位，十分位补 0。Darren 的 0.4 是 40 格，太大了，应写 0.04。
例子：涂 7 格 → 7/100 = 0.07，不是 0.7。
注意：写好后把小数换回格数，和图上的格数比一比。
check and correct = semak dan betulkan
Check two things in a decimal: ① the ones digit: a fraction with 100 below and less than 100 on top is less than 1, so its ones digit is 0; ② the places: a few single squares go in the hundredths, with a 0 in the tenths. Darren's 0.4 is 40 squares, far too many, so it should be 0.04.
Example: 7 squares → 7/100 = 0.07, not 0.7.
Watch out: turn your decimal back into squares and compare with the picture.
Cuba ini
Kad perkataan dan kad angka
配对 = padankan
先看关键词：有 perpuluhan 的是小数，点后数字要逐个对上；以 perseratus 结尾的是分数，读出的数是分子，分母是 100。
例子：dua belas perseratus → 12/100。
注意：lima perseratus 和 lima puluh perseratus 大小差很多，要听清楚有没有 puluh。
matching = padankan
Look at the key word on each word card first. Cards with perpuluhan are decimals, so match their digits one by one. Cards ending in perseratus are fractions, and the number said is the numerator over 100. Read one-digit hundredths very carefully.
Example: sifar perpuluhan lima tiga → 0.53; dua belas perseratus → 12/100.
Watch out: lima perseratus and lima puluh perseratus are not the same size, so listen for puluh.
Ringkasan
Syabas!
0.3 = 0.30 = 30100
Satu digit selepas titik ialah persepuluh. Setiap persepuluh ialah 10 perseratus, jadi warnakan baris penuh. Semak digit sa dan tempat setiap digit.
Latihan tambahan →