Unit 3
Tanda Titik Koordinat
Kelas 4 Bestari merancang kebun sekolah pada kertas grid.
Mereka perlu menanda titik bagi setiap tanaman mengikut koordinat yang diberi.

描点 = tanda titik
上一课是看图写坐标,这一课反过来:已知坐标,要在方格图上把点画出来。描点的步骤和读坐标一样,都是从原点出发、先横后竖,只是最后要在正确的位置画一个点,再写上名字。
例子:老师说“把旗子插在 (2, 3)”,你就从原点往右 2 格、往上 3 格插下去。
注意:点要画在格线的交叉点上,不是画在格子中间。
plotting points = tanda titik
Last unit we read a grid and wrote coordinates; now it is the other way round: we are given a coordinate and must draw the point on the grid. The steps are the same, starting at the origin and going across then up, but at the end you mark a dot in the right place and write its name.
Example: if the teacher says 'put the flag at (2, 3)', go 2 right and 3 up from the origin and place it there.
Watch out: dots go where grid lines cross, not in the middle of a square.
Langkah
Tanda titik B (2, 3)
① ke kanan ② ke atas ③ tanda titik ④ tulis nama
描点四步 = empat langkah tanda titik
第一步:手指放在原点 O,看第一个数字,往右走那么多格线。第二步:看第二个数字,往上走那么多格线。第三步:在停下来的交叉点画一个清楚的圆点。第四步:在点旁边写上名字,有需要再写坐标。
例子:描 (4, 1):往右 4,往上 1,画点。
注意:往上走的时候要直直往上,不要斜着走。
four steps to plot = empat langkah tanda titik
Step 1: put your finger on the origin O and move right as many grid lines as the first number. Step 2: move up as many grid lines as the second number. Step 3: mark a clear dot at the crossing where you stop. Step 4: write the point's name beside it, and the coordinate if needed.
Example: to plot (4, 1), go right 4, up 1, and mark the dot.
Watch out: when moving up, go straight up, not at a slant.
Kebun sekolah
Tanda empat tanaman
Cili (5, 1) · Terung (1, 4) · Serai (0, 2) · Pisang (4, 0)
描几个点 = tanda beberapa titik
一个一个来:辣椒 (5, 1),往右 5、往上 1;茄子 (1, 4),往右 1、往上 4。香茅 (0, 2) 第一个数字是 0,不用往右,直接在纵轴上往上 2;香蕉 (4, 0) 第二个数字是 0,在横轴上往右 4 就停。
例子:(0, 5) 画在纵轴上,(5, 0) 画在横轴上。
注意:有 0 的坐标,点一定落在轴上。
plotting several points = tanda beberapa titik
Take them one at a time: chilli (5, 1) is right 5, up 1; brinjal (1, 4) is right 1, up 4. Lemongrass (0, 2) has first number 0, so do not move right; just go up 2 along the y-axis. Banana (4, 0) has second number 0, so stop after moving 4 along the x-axis.
Example: (0, 5) is plotted on the y-axis and (5, 0) on the x-axis.
Watch out: a coordinate containing 0 always puts the point on an axis.
Elakkan silap
Garis, bukan petak
(3, 1) ≠ (1, 3)
• Ke kanan dahulu, kemudian ke atas.
• Kira garis grid, mula dari 0.
• Tanda di persilangan garis.
• Kira garis grid, mula dari 0.
• Tanda di persilangan garis.
常见错误 = silap biasa
第一个错误是把次序弄反,把 (3, 1) 画成 (1, 3),结果点跑到别的地方。第二个错误是数格子的方块,而不是数格线,结果每个点都差了一格。记住:从原点 0 开始数格线,点画在交叉点上。
例子:(2, 2) 的点在第 2 条竖线和第 2 条横线的交叉处。
注意:画完后,从点往下、往左看,核对两个数字。
common mistakes = silap biasa
The first mistake is swapping the order and plotting (3, 1) at (1, 3), which puts the point somewhere else. The second is counting the squares instead of the grid lines, which makes every point one step off. Remember: count grid lines starting from 0 at the origin, and place the dot where the lines cross.
Example: the point (2, 2) is where the 2nd vertical line meets the 2nd horizontal line.
Watch out: after plotting, look down and left from the dot to check both numbers.
Cuba
Titik manakah ialah (2, 5)?
找对的点 = cari titik yang betul
照着坐标走一次:手指从原点出发,先往右数第一个数字的格线,再往上数第二个数字的格线,看停在哪一个点上。图上有一个点是次序颠倒的陷阱,还有一个点只差一格,要数清楚。
例子:要找 (3, 1),就是往右 3,再往上 1。
注意:每走一格都要对准格线。
finding the right point = cari titik yang betul
Follow the coordinate once: start at the origin, count right by the first number of grid lines, then up by the second number, and see which point you land on. One point on the grid is a swapped-order trap and another is just one step off, so count carefully.
Example: to find (3, 1), go right 3, then up 1.
Watch out: line up with a grid line at every step.
Pilih
Pilih semua titik yang terletak pada paksi-x.
横轴上的点 = titik pada paksi-x
想一想:一个点要落在横轴上,从原点出发时需不需要往上走?如果不用往上走,坐标里哪一个位置的数字是 0?用这个规则把六个坐标逐个检查,符合的才点。
例子:(7, 0) 在横轴上;(0, 7) 在纵轴上。
注意:0 在前和 0 在后,意思完全不一样。
points on the x-axis = titik pada paksi-x
Think: for a point to lie on the x-axis, do you move up at all from the origin? If not, which position in the coordinate holds the 0? Use this rule to check each of the six coordinates and tap only those that fit.
Example: (7, 0) is on the x-axis; (0, 7) is on the y-axis.
Watch out: a 0 first and a 0 second mean completely different things.
Cuba
Hana menanda titik P (4, 3). Rajah manakah betul?
Rajah A
Rajah B
Rajah C
检查描点 = semak titik
三幅图都画了 P,只是位置不一样。对每一幅图,从 P 往下看,数它在横轴的第几条线;再从 P 往左看,数它在纵轴的第几条线,写出这幅图的坐标,和题目的坐标比较。
例子:如果某幅图的 P 往下对到 2、往左对到 5,那幅图画的是 (2, 5)。
注意:三幅图都要检查,不要只看第一幅。
checking a plotted point = semak titik
All three diagrams show P, but in different places. For each one, look down from P to see which line of the x-axis it is on, then look left to see which line of the y-axis it is on. Write that diagram's coordinate and compare it with the one in the question.
Example: if P lines up with 2 below and 5 to the left, that diagram shows (2, 5).
Watch out: check all three diagrams, not just the first.
Ringkasan
Syabas!
ke kanan → ke atas → tanda
Mula di O, bergerak ke kanan dahulu, kemudian ke atas. Tanda titik di persilangan garis dan tulis namanya.
Latihan tambahan →