Unit 11

Teroka Ria

Setiap pusingan memberi satu nombor dan satu sasaran: puluh terdekat atau ratus terdekat.

Langkah 1

Pilih cabaran

Setiap pusingan memberi satu nombor dan satu sasaran: puluh terdekat atau ratus terdekat.

nombor + sasaran

Pilih cabaran = 选择挑战
每一轮会给一个数和一个目标：puluh terdekat（到十）或 ratus terdekat（到百）。同一个数，目标不同，答案也不同。
例子：482 到十得 480，到百得 500。
注意：开始前先读目标，别把“到百”的题做成“到十”。

Pilih cabaran = Choose a challenge
Each round gives you one number and one target: the nearest ten or the nearest hundred. The same number can have different answers for different targets.
Example: 482 rounds to 480 for the nearest ten, but to 500 for the nearest hundred.
Watch out: Read the target before you start, so you do not round to the wrong place.

Langkah 2

Terangkan keputusan

Sebut digit yang diperhatikan dan arah pembundaran sebelum memilih jawapan.

lihat → fikir → pilih

Terangkan keputusan = 说出理由
选答案前先说出两件事：你看哪个数位，往上还是往下。例如到十就看个位，个位是 6 就往上进。
例子：735 到百：看十位 3，3 比 5 小，往下舍得 700。
注意：只猜答案不说理由，很容易看错数位。

Terangkan keputusan = Explain your decision
Before choosing, say two things: which digit you looked at and which way you rounded. For the nearest ten you look at the ones, and a 6 in the ones means round up.
Example: Round 735 to the nearest hundred. The tens digit is 3, which is less than 5, so it rounds down to 700.
Watch out: Guessing without a reason makes it easy to look at the wrong digit.

Langkah 3

Semak dengan garis nombor

Bayangkan dua puluh atau dua ratus yang mengapit nombor untuk menentukan yang terdekat.

bawah ← nombor → atas

Semak dengan garis nombor = 用数线检查
把数放在数线上，想象它两边的两个整十（或整百），再看它离哪一边比较近。比较近的那一个就是答案。
例子：173 在 170 和 180 之间，离 170 差 3，离 180 差 7，所以到十得 170。
注意：两边的数要选对：到十用整十，到百才用整百。

Semak dengan garis nombor = Check with a number line
Picture the number on a number line between the two tens or two hundreds around it. Then see which one it is closer to; that is the answer.
Example: 173 is between 170 and 180. It is 3 away from 170 and 7 away from 180, so it rounds to 170.
Watch out: Pick the right pair of neighbours: tens for a tens target, hundreds for a hundreds target.

Semak cepat · Soalan 1 / 2

Cuba sendiri

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

Cabaran puluh: bundarkan 326.

Cabaran puluh = 到十的挑战
这题要把 326 四舍五入到最接近的十。先说出要看的数位，再判断往上还是往下。可以想象 326 在数线上的位置来检查。
例子：544 到十：个位是 4，往下舍得 540。
注意：这一轮的目标是十，做题时一直记住目标。

Cabaran puluh = Tens challenge
The question asks you to round 326 to the nearest ten. Say which digit you will look at, then decide up or down. Picture 326 on a number line to check.
Example: 544 to the nearest ten: the ones digit is 4, so it rounds down to 540.
Watch out: Keep the target in mind; this round asks for tens.

Semak cepat · Soalan 2 / 2

Cuba sendiri

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

Cabaran ratus: bundarkan 326.

Cabaran ratus = 到百的挑战
同样是 326，这次要四舍五入到最接近的百。到百要看十位，不看个位。想一想 326 夹在哪两个整百之间，离哪一个比较近。
例子：681 到百：十位是 8，往上进得 700。
注意：上一题看个位，这一题要改看十位，别沿用上一题的做法。

Cabaran ratus = Hundreds challenge
It is 326 again, but this time round it to the nearest hundred. For hundreds you look at the tens digit, not the ones. Think about which two hundreds 326 sits between.
Example: 681 to the nearest hundred: the tens digit is 8, so it rounds up to 700.
Watch out: The last question used the ones digit; this one needs the tens digit.

Ringkasan

Syabas!

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Ingat: pilih cabaran; terangkan keputusan; semak dengan garis nombor.

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