Latihan tambahan

先倒掉再加入 = buang, kemudian tambah “倒掉”的水要减，“加入”的水要加。按事情发生的先后，从左到右算：先用原来的水减去倒掉的，再加上新加的水。毫升不够减时向升借一千毫升；相加后毫升满一千要进一升。 例子：9 ℓ 200 mℓ − 1 ℓ 500 mℓ + 2 ℓ 400 mℓ → 7 ℓ 700 mℓ + 2 ℓ 400 mℓ → 10 ℓ 100 mℓ。 注意：先把故事里的每个动作写成加或减，再列算式。

pour out, then pour in = buang, kemudian tambah Water poured out is subtracted and water poured in is added. Follow the order of events from left to right: start with the water in the tank, take away what was poured out, then add the new water. Borrow 1 000 mℓ when the mℓ cannot be subtracted, and regroup 1 000 mℓ as 1 ℓ after adding. Example: 9 ℓ 200 mℓ − 1 ℓ 500 mℓ + 2 ℓ 400 mℓ → 7 ℓ 700 mℓ + 2 ℓ 400 mℓ → 10 ℓ 100 mℓ. Watch out: turn each action in the story into + or − before you write the number sentence.

混合单位化成毫升 = tukar semua kepada mℓ 把每一个容量都化成毫升：升数乘一千，再加上毫升数。毫升只有两位数时，化成毫升后十位和个位要放对位置，百位是零。全部化好以后，从左到右先加后减。 例子：1 250 mℓ + 1 ℓ 60 mℓ − 900 mℓ → 1 250 + 1 060 = 2 310 → 2 310 − 900 = 1 410 mℓ。 注意：1 ℓ 60 mℓ 是 1 060 mℓ，不是 1 600 mℓ。

change every amount to millilitres = tukar semua kepada mℓ Change each volume into millilitres: litres × 1 000, plus the millilitres. When the millilitres have only two digits, keep them in the tens and ones places and put a zero in the hundreds. Then work from left to right, adding and then subtracting. Example: 1 250 mℓ + 1 ℓ 60 mℓ − 900 mℓ → 1 250 + 1 060 = 2 310 → 2 310 − 900 = 1 410 mℓ. Watch out: 1 ℓ 60 mℓ is 1 060 mℓ, not 1 600 mℓ.

连续用掉 = digunakan dua kali 两次都是“用掉”，所以两次都要减。第一步：五升的毫升栏是零，要先借一升换成一千毫升，再减第一次用掉的量；第二步：用剩下的量再减第二次用掉的量，毫升不够减又要借。 例子：4 ℓ − 1 ℓ 200 mℓ − 650 mℓ → 2 ℓ 800 mℓ − 650 mℓ → 2 ℓ 150 mℓ。 注意：借了一升以后，升栏要记得少一。

used twice = digunakan dua kali Both amounts were used, so both are subtracted. Step 1: the 5 ℓ has 0 in the mℓ column, so borrow 1 ℓ as 1 000 mℓ before taking away the first amount. Step 2: take the second amount from what is left, borrowing again if the mℓ are not enough. Example: 4 ℓ − 1 ℓ 200 mℓ − 650 mℓ → 2 ℓ 800 mℓ − 650 mℓ → 2 ℓ 150 mℓ. Watch out: after borrowing 1 ℓ, the litres column is 1 less.

卖出再补做 = jual, kemudian buat lagi 卖出去的豆奶要减，后来再做的要加。可以先把所有容量都化成毫升再算；也可以用“升、毫升”竖式算完，最后再化成毫升。题目要的单位是毫升，别忘了换。 例子：10 ℓ − 3 ℓ 250 mℓ + 1 ℓ 500 mℓ → 6 ℓ 750 mℓ + 1 ℓ 500 mℓ → 8 ℓ 250 mℓ = 8 250 mℓ。 注意：从整升减去带毫升的数，第一步就要借位。

sold, then made more = jual, kemudian buat lagi The soya milk sold is subtracted and the extra batch is added. You can change every amount into millilitres first, or work in ℓ and mℓ columns and change to millilitres at the end. The question wants millilitres, so remember to convert. Example: 10 ℓ − 3 ℓ 250 mℓ + 1 ℓ 500 mℓ → 6 ℓ 750 mℓ + 1 ℓ 500 mℓ → 8 ℓ 250 mℓ = 8 250 mℓ. Watch out: taking an amount with mℓ from whole litres needs a borrow in the first step.