Latihan tambahan

倒推除以一千 = cari nombor sebelum ÷ 1 000 被除数 = 商 × 除数。这里除数是一千，所以把商乘一千，也就是在后面补三个 0。写好以后，再除以一千检查一次。 例子：□ ÷ 1 000 = 8 → □ = 8 000。 注意：补的 0 要和除数的 0 一样多，写完数一数。

work back from ÷ 1 000 = cari nombor sebelum ÷ 1 000 The number divided = answer × divisor. Here the divisor is one thousand, so multiply the answer by one thousand by writing three zeros after it. Then divide by one thousand once more to check. Example: □ ÷ 1 000 = 8, so □ = 8 000. Watch out: write as many zeros as the divisor has, and count them when you finish.

两边相等 = kedua-dua belah sama 等号两边的值一样。先把左边算出来，得到一个数；再问自己：右边的被除数要除以多少，才会得到这个数？如果右边的数是左边的值后面多了几个 0，就看多了几个 0 来决定除数。算好以后，把除数放回去，两边各算一次检查。 例子：60 ÷ 2 = 120 ÷ □，左边是 30，120 ÷ 4 = 30，所以 □ = 4。 注意：等号不是“写答案”的意思，而是“两边一样大”；先算左边，不要直接照抄左边的除数。

both sides equal = kedua-dua belah sama The two sides of the equals sign have the same value. Work out the left side first to get a number. Then ask: what must the number on the right be divided by to give that same number? If it is the left-hand value with extra zeros, the number of extra zeros tells you the divisor. Put the divisor back and work out both sides to check. Example: 60 ÷ 2 = 120 ÷ □; the left side is 30 and 120 ÷ 4 = 30, so □ = 4. Watch out: the equals sign means both sides are the same size, not write the answer here; work out the left side and do not just copy its divisor.

中间有零 = sifar di tengah 题目给出商和除数，要找被除数，就用乘法倒推：商 × 除数。这个商的十位是 0，乘一百时要把它照原样写下来，再在后面补两个 0。 例子：□ ÷ 100 = 208 → □ = 20 800。 注意：中间的 0 不能漏，漏了就变成另一个数。

a zero in the middle = sifar di tengah The answer and the divisor are given, so work back with multiplication: answer × divisor. This answer has 0 in the tens place; copy it exactly when multiplying by one hundred, then write two zeros after it. Example: □ ÷ 100 = 208, so □ = 20 800. Watch out: do not lose the middle zero, or you get a different number.