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乘后化毫米 = darab, kemudian tukar kepada mm 最简单的做法：先把长度化成毫米，再乘以这个数，得到的就是毫米。另一种做法：厘米和毫米分别乘，毫米满十进厘米，最后把厘米乘十加毫米。两种做法可以互相检查。 例子：7 × 3 cm 4 mm = 7 × 34 mm = 238 mm。 注意：毫米也要乘，不能只乘厘米。

multiply, then change to millimetres = darab, kemudian tukar kepada mm The simplest way is to change the length into millimetres and then multiply; the product is already in millimetres. Another way is to multiply centimetres and millimetres separately, regroup tens of millimetres into centimetres, then change the result. Each way checks the other. Example: 7 × 3 cm 4 mm = 7 × 34 mm = 238 mm. Watch out: the millimetres must be multiplied too, not only the centimetres.

千米米乘三 = darab km dan m dengan 3 米栏先乘：如果积有一千或以上，就把 1 000 m 换成 1 km，送到千米栏；米栏留下不满一千的部分。千米栏乘以三，再加上送来的一千米。答案写成几千米几米。 例子：4 × 5 km 300 m = 20 km 1 200 m = 21 km 200 m。 注意：进位以后米栏要减掉一千。

multiplying km and m by 3 = darab km dan m dengan 3 Multiply the metres first. If the product is 1 000 or more, change 1 000 m into 1 km for the kilometres column and keep the part below 1 000. Multiply the kilometres by 3 and add the carried kilometre. Write the answer in km and m. Example: 4 × 5 km 300 m = 20 km 1 200 m = 21 km 200 m. Watch out: after carrying, take 1 000 away from the metres.

往返距离 = jarak ulang-alik 往返是去和回，同一段路走两次，所以单程距离乘二。米栏乘二以后如果满一千，要进一千米；最后题目要米，就把千米乘一千再加米。 例子：往返 2 km 780 m → 2 × 2 km 780 m = 4 km 1 560 m = 5 km 560 m = 5 560 m。 注意：别忘了“往返”要乘二。

round-trip distance = jarak ulang-alik A round trip is there and back, the same road twice, so multiply the one-way distance by 2. If the metres reach 1 000 after doubling, carry 1 km; the question wants metres, so multiply the kilometres by 1 000 and add the metres. Example: round trip on 2 km 780 m → 2 × 2 km 780 m = 4 km 1 560 m = 5 km 560 m = 5 560 m. Watch out: do not forget that a round trip means times two.

毫米积进位 = kumpul semula hasil darab mm 毫米栏乘出来的数常常超过十，要把它拆成几厘米几毫米：十位上的数是厘米，个位上的数是毫米。厘米部分加到厘米栏的积里，毫米栏只留个位。 例子：6 × 9 cm 6 mm = 54 cm 36 mm = 57 cm 6 mm。 注意：不要把毫米栏的十位数字忘掉，也不要把它写到毫米栏里。

regrouping the millimetres product = kumpul semula hasil darab mm The millimetres product is often more than 10, so split it into centimetres and millimetres: the tens digit gives centimetres and the ones digit gives millimetres. Add those centimetres to the centimetres product and keep only the ones in the millimetres column. Example: 6 × 9 cm 6 mm = 54 cm 36 mm = 57 cm 6 mm. Watch out: do not lose the tens of the millimetres product or leave them in the millimetres column.

只有米的量乘数 = darab m, jawapan dalam km dan m 只有米的量乘一位数，先照整数乘法算出总共有多少米。积有一千或以上时，就可以写成千米和米：千位以上的部分是千米，最后三位是米。写好后可以把千米乘一千再加米，检查是否等于原来的积。 例子：4 × 650 m = 2 600 m = 2 km 600 m。 注意：1 km = 1 000 m，换算时以一千为一组，不是一百。

metres only, answer in km and m = darab m, jawapan dalam km dan m Multiply the metres by the one-digit number as an ordinary multiplication to find the total metres. When the product is 1 000 or more, write it in km and m: the part above the last three digits is kilometres and the last three digits are metres. To check, multiply the kilometres by 1 000, add the metres and compare with the product. Example: 4 × 650 m = 2 600 m = 2 km 600 m. Watch out: 1 km = 1 000 m, so group the metres in thousands, not hundreds.