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厘米乘十 = darab 10 把厘米换成毫米，因为每 1 厘米有 10 毫米，所以把厘米数乘 10。两位数乘 10，就在后面加一个零。 例子：18 cm = 180 mm。 注意：只乘一次 10，不是乘 100。

multiply by ten = darab 10 To change centimetres into millimetres, remember each centimetre has 10 millimetres, so multiply the centimetres by 10. A two-digit number times 10 gets one zero at the end. Example: 18 cm = 180 mm. Watch out: multiply by 10 once, not by 100.

毫米除以十 = bahagi 10 毫米换成厘米是小单位换大单位，数字要变小。每 10 毫米合成 1 厘米，所以把毫米数除以 10，也就是去掉末尾一个零。 例子：370 mm = 37 cm。 注意：换成大单位以后，数字一定变小。

divide by ten = bahagi 10 Changing millimetres into centimetres is a small unit to a big one, so the number gets smaller. Every 10 millimetres make 1 centimetre, so divide by 10, which removes one zero from the end. Example: 370 mm = 37 cm. Watch out: after changing to the bigger unit, the number must be smaller.

两部分合起来 = gabungkan dua bahagian 先把厘米部分乘 10 换成毫米，再加上毫米部分。不要把两个数字直接相加，因为它们的单位不同。 例子：3 cm 8 mm = 30 mm + 8 mm = 38 mm。 注意：厘米和毫米的数字不能直接相加。

joining the two parts = gabungkan dua bahagian Change the centimetre part into millimetres by multiplying by 10, then add the millimetre part. Do not add the two numbers straight away, because their units are different. Example: 3 cm 8 mm = 30 mm + 8 mm = 38 mm. Watch out: centimetre and millimetre numbers cannot simply be added together.

中间有零 = ada sifar di tengah 把毫米数拆成整十的部分和个位。整十的部分除以 10 变成厘米，个位就是毫米。数字中间的零也要算进整十的部分里，不能丢掉。 例子：509 mm = 500 mm + 9 mm = 50 cm 9 mm。 注意：丢掉中间的零，厘米的数字会变小很多。

a zero in the middle = ada sifar di tengah Split the millimetres into the tens part and the ones. Divide the tens part by 10 to get centimetres; the ones are millimetres. A zero in the middle belongs to the tens part and must not be dropped. Example: 509 mm = 500 mm + 9 mm = 50 cm 9 mm. Watch out: dropping the middle zero makes the centimetres far too small.

应用题换单位 = tukar unit dalam ayat 题目给了毛虫的长度，有厘米也有毫米，要求全部用毫米表示。先把厘米乘 10，再加上毫米。算好后想一想：换成毫米以后数字应该变大。 例子：一片花瓣长 2 cm 6 mm，就是 26 mm。 注意：两个数字直接相加，得到的不是正确的毫米数。

changing units in a story = tukar unit dalam ayat The caterpillar's length is given in centimetres and millimetres, and the question wants it all in millimetres. Multiply the centimetres by 10, then add the millimetres. Then check: in millimetres the number should be bigger. Example: a petal 2 cm 6 mm long is 26 mm. Watch out: simply adding the two numbers does not give the right millimetres.