Latihan tambahan

借位相减 = tolak dengan kumpul semula 先看毫米栏：上面的毫米如果比下面少，就向厘米栏借一厘米，变成十毫米加上原来的毫米，再减；厘米栏因为借走了一，要先减一再减下面的厘米。 例子：43 cm 2 mm − 18 cm 6 mm → 42 cm 12 mm − 18 cm 6 mm → 24 cm 6 mm。 注意：借位以后厘米栏忘了减一，是最常见的错误。

subtracting with regrouping = tolak dengan kumpul semula Look at the millimetres first. If the top millimetres are fewer, borrow 1 cm from the centimetres column, making 10 mm plus the millimetres already there, and subtract. The centimetres column has lent one, so reduce it by one before subtracting the centimetres. Example: 43 cm 2 mm − 18 cm 6 mm → 42 cm 12 mm − 18 cm 6 mm → 24 cm 6 mm. Watch out: forgetting to reduce the centimetres after borrowing is the most common slip.

千米米相减化成米 = tolak km dan m, jawapan dalam m 方法一：两个距离先都化成米（千米乘一千加米），再列竖式减。方法二：分栏减，米栏不够减就借一千米，最后把千米乘一千加上米。 例子：6 km 200 m − 1 km 650 m → 6 200 m − 1 650 m → 4 550 m。 注意：借一千米以后，千米栏要少一。

subtracting km and m, answer in m = tolak km dan m, jawapan dalam m Way 1: change both distances into metres (kilometres × 1 000 plus metres) and subtract in a column. Way 2: subtract in unit columns, borrowing 1 km as 1 000 m when the metres are not enough, then turn the result into metres. Example: 6 km 200 m − 1 km 650 m → 6 200 m − 1 650 m → 4 550 m. Watch out: after borrowing 1 km, the kilometres column is one less.

剪了两次还剩多少 = baki selepas dua potongan 丝带剪了两次，就是连减：原长减第一段，得到的再减第二段。九十五厘米没有毫米，毫米栏是零，第一步就要借一厘米；第二步如果毫米不够减，也要再借。也可以全部化成毫米再连减。 例子：80 cm − 25 cm 3 mm − 17 cm 8 mm → 54 cm 7 mm − 17 cm 8 mm → 36 cm 9 mm。 注意：每一步都要检查借位后的厘米数。

what is left after two cuts = baki selepas dua potongan The ribbon is cut twice, so subtract twice: the full length minus the first piece, then that result minus the second piece. 95 cm has 0 mm, so the first step already needs a borrow; the second step may need one too. You could also change everything into millimetres first. Example: 80 cm − 25 cm 3 mm − 17 cm 8 mm → 54 cm 7 mm − 17 cm 8 mm → 36 cm 9 mm. Watch out: check the centimetres after each borrow.

米数只有两位 = meter dua digit 七十米是两位数，放在米栏时要对齐十位和个位，百位是零。被减数十三千米没有米，要借 1 km 变成 1 000 m，千米数少一，然后一千米减七十米，再减千米。 例子：11 km − 2 km 40 m → 10 km 1 000 m − 2 km 40 m → 8 km 960 m。 注意：借位以后，千米数和米数都要重新检查。

two-digit metres = meter dua digit 70 m has two digits, so it sits under the tens and ones of the metres column with 0 hundreds. The 13 km has no metres, so borrow 1 km as 1 000 m and make the kilometres one less; then subtract 70 from 1 000 and subtract the kilometres. Example: 11 km − 2 km 40 m → 10 km 1 000 m − 2 km 40 m → 8 km 960 m. Watch out: after borrowing, check both the kilometres and the metres again.