Bundar Nombor

约到十 = bundar kepada puluh terdekat 先找出这个数在哪两个整十之间，再看它比较靠近哪一个。在数线上，2 473 在 2 470 和 2 480 之间，离 2 470 只有 3 格，比较近。 例子：5 128 在 5 120 和 5 130 之间，比较靠近 5 130 → 约成 5 130。 注意：约到十时，个位变成 0。

round to the nearest ten = bundar kepada puluh terdekat Find the two tens the number lies between, then see which one it is closer to. On the number line, 2 473 is between 2 470 and 2 480 and only 3 steps from 2 470, so it is closer to 2 470. Example: 5 128 lies between 5 120 and 5 130 and is closer to 5 130, so it rounds to 5 130. Watch out: when rounding to the nearest ten, the ones digit becomes 0.

正中间 = di tengah-tengah 如果数目刚好在两个整百的正中间，离两边一样近，规定要约成比较大的那一个。 例子：6 150 在 6 100 和 6 200 的正中间 → 约到百是 6 200。 注意：约到百时，十位和个位都变成 0。

exactly in the middle = di tengah-tengah If a number is exactly halfway between two hundreds, it is equally close to both, and the rule is to round up to the greater one. Example: 6 150 is halfway between 6 100 and 6 200 → it rounds to 6 200 (nearest hundred). Watch out: when rounding to the nearest hundred, the tens and ones become 0.

规则 = peraturan；右边一位 = digit di sebelah kanan 要约到哪一位，就看它右边那一位：约到千看百位，约到百看十位，约到十看个位。右边那一位是 5、6、7、8、9 就进 1；是 0、1、2、3、4 就不变。右边的数位全部变成 0。 例子：6 720 约到千 → 看百位 7 → 千位加 1 → 7 000；3 405 → 看百位 4 → 3 000。 注意：进位的时候，只加在要约的那一位。

rule = peraturan, digit to the right = digit di sebelah kanan To round to a place, look at the digit just to its right: for thousands look at the hundreds, for hundreds look at the tens, for tens look at the ones. If that digit is 5–9, add 1; if it is 0–4, keep it. All places to the right become 0. Example: 6 720 to the nearest thousand → hundreds digit 7 → add 1 → 7 000; 3 405 → hundreds digit 4 → 3 000. Watch out: when you add 1, add it only to the place you are rounding to.

数线法 = kaedah garis nombor；中点 = titik tengah 约到千时，先找出这个数在哪两个整千之间，再找出它们的正中间（例如 6 000 和 7 000 的中间是 6 500）。数在中点右边，就约成比较大的整千；在中点左边，就约成比较小的整千；刚好在中点，也约成比较大的。 例子：2 830 在 2 000 和 3 000 之间，中点是 2 500，2 830 在右边 → 约成 3 000。 注意：数线法和“看百位”的规则结果一样：百位 5 到 9 就在中点或中点右边。

number line method = kaedah garis nombor, midpoint = titik tengah To round to the nearest thousand, find the two thousands the number lies between and their midpoint (for 6 000 and 7 000 it is 6 500). If the number is to the right of the midpoint, round to the greater thousand; to the left, round to the smaller one; exactly on the midpoint, round to the greater one. Example: 2 830 lies between 2 000 and 3 000; the midpoint is 2 500 and 2 830 is to its right → 3 000. Watch out: this gives the same answer as the hundreds-digit rule: a hundreds digit of 5 to 9 means on or to the right of the midpoint.

取近似值 = bundar；中点 = titik tengah；方向 = arah 实验台把数目放在数线上。先选要约到最接近的十、百或千，再看两端和中点。按下显示按钮后，弧形箭头会指向较接近的一端，并说明向上约或向下约。 例子：一个点在中点右边，会指向右端较大的数。 注意：先确认题目要约到哪一个数位，不同数位的两端和中点都不同。

round = bundar; midpoint = titik tengah; direction = arah The lab places a number on a number line. Choose whether to round to the nearest ten, hundred or thousand, then inspect the two endpoints and the midpoint. Press the show button to see an arc point to the nearer endpoint and explain whether the number rounds up or down. Example: a point to the right of the midpoint moves to the larger endpoint. Watch out: identify the requested place first, because each choice has different endpoints and a different midpoint.

先找 = cari dahulu；数线 = garis nombor 题目问的是决定约数方向之前，数线上必须先找什么。回想实验台中两端之间那条虚线，以及点在虚线左边或右边时箭头怎样改变。选项里的颜色和箭头长度只是画面样式，不决定答案。 例子：可以先说出两个端点，再找它们正中间的位置。 注意：不要在还没看清中间位置前就猜向上或向下。

find first = cari dahulu; number line = garis nombor The question asks what must be identified before deciding the rounding direction. Recall the dashed mark halfway between the endpoints and how the arrow changed when the point was on its left or right. The colour of the point and the arrow length are only visual features and do not determine rounding. Example: name both endpoints first, then locate the point exactly halfway between them. Watch out: do not guess up or down before locating the halfway position.

约到百 = bundar kepada ratus terdekat 约到百要看十位的数字，决定百位要不要加 1，然后十位和个位变成 0。 例子：思考方法像这样：2 741 约到百 → 看十位 4 → 百位不变 → 2 700。 注意：答案的十位和个位一定是 0。

round to the nearest hundred = bundar kepada ratus terdekat To round to the nearest hundred, look at the tens digit to decide whether the hundreds digit goes up by 1; then the tens and ones become 0. Example: think like this: 2 741 to the nearest hundred → tens digit 4 → hundreds stay → 2 700. Watch out: the answer must end in two zeros.

约到千 = bundar kepada ribu terdekat 约到千只看百位的数字，不看十位和个位。决定千位加不加 1，再把其余三位变成 0。 例子：4 190 约到千 → 百位是 1 → 4 000。 注意：8 049 的十位是 4、个位是 9，但约到千时不用看它们。

round to the nearest thousand = bundar kepada ribu terdekat For the nearest thousand, look only at the hundreds digit, not the tens or ones. Decide whether the thousands digit goes up, then make the other three places 0. Example: 4 190 to the nearest thousand → hundreds digit 1 → 4 000. Watch out: 8 049 has 4 tens and 9 ones, but you do not use them when rounding to the nearest thousand.

反过来想 = fikir terbalik 把每个选项都约到千，看看哪一个会变成 4 000。会约成 4 000 的数，要在 3 500 到 4 499 之间。 例子：2 600 约到千 → 3 000；3 499 约到千 → 3 000。 注意：3 开头的数也可能约成 4 000。

think backwards = fikir terbalik Round each option to the nearest thousand and see which becomes 4 000. Numbers that round to 4 000 lie from 3 500 to 4 499. Example: 2 600 → 3 000; 3 499 → 3 000 when rounded to the nearest thousand. Watch out: a number starting with 3 can still round to 4 000.