objek yang selamat = safe objects Pick a few everyday items to weigh, such as a pencil case, an apple and a water bottle. Each must sit steadily on the scale without rolling, leaking or being so big that it damages the scale. Example: a pencil case, an apple and a bottle make 1 + 1 + 1 = 3 items. Watch out: glasses or open bottles of water may break or spill, so leave them out.
Langkah 2
Anggar dengan unit sesuai
Catat anggaran dalam g atau kg berdasarkan saiz dan objek rujukan.
anggaran + unit = estimate with unit Using the size of each item and the reference object, write an estimated mass and choose g or kg. Small light items get g; heavy ones get kg. Example: the reference apple is 200 g and the bottle feels like two apples, so estimate 200 + 200 = 400 g. Watch out: every estimate in the table needs its own unit, so none should be left bare.
Langkah 3
Semak pola keputusan
Bandingkan anggaran dengan jisim sebenar dan cari anggaran yang paling dekat.
anggaran · sebenar · beza
pola keputusan = 结果的规律 把估计值和实际重量放在一起,算出每样东西差多少,找出估得最接近的。 例子:苹果估 200 g 实际 180 g,差 200 - 180 = 20 g;水壶估 400 g 实际 520 g,差 520 - 400 = 120 g,苹果估得较准。 注意:算差距时用大数减小数,不会得出负数。
pola keputusan = pattern of results Place each estimate beside the real mass, find each gap, and pick the closest estimate. Also notice whether you usually guess too heavy or too light. Example: apple estimate 200 g, real 180 g, gap 200 - 180 = 20 g; bottle estimate 400 g, real 520 g, gap 520 - 400 = 120 g, so the apple estimate is closer. Watch out: always take the smaller value from the bigger one when finding a gap.
Semak cepat · Soalan 1 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
urutan penyiasatan = order of the investigation The question asks for the correct order of steps in a mass investigation. Recall Langkah 1 to 3. Check that each step uses the result of the one before. Example: for a cake, weigh 200 g of flour, then add 100 g of sugar, 200 + 100 = 300 g, and a mixed-up order spoils it. Watch out: check the order of all three actions.
Semak cepat · Soalan 2 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
selamat ditimbang = safe to weigh This question asks what kind of object is suitable to put on a scale. Think about what could happen: might it roll away, spill, or break the scale? Check with Langkah 1. Example: a scale holds up to 5 kg, and with a 2 kg bag of rice on it there is room for 5 - 2 = 3 kg more. Watch out: safety protects the scale and you, not only the object.
Ringkasan
Syabas!
Kamu telah belajar tentang Teroka Ria.
Ingat: pilih objek yang selamat; anggar dengan unit sesuai; semak pola keputusan.