Unit 12
Akal Pintar
□ + □ = 18.435
Cari dua nombor perpuluhan yang sesuai. Ada banyak jawapan!
找两个加数 = cari dua nombor
只要两个数加起来等于 18.435 就对，所以答案有很多。一个好方法是：先自己选一个比较容易的数，再用减法求出另一个。
例子：□ + □ = 5.5，可以是 2 + 3.5，也可以是 1.25 + 4.25。
注意：两个数都要比和小。
find two numbers = cari dua nombor
Any two numbers that add up to 18.435 are correct, so there are many answers. A good method is to choose an easy first number yourself, then subtract to find the other.
Example: □ + □ = 5.5 could be 2 + 3.5 or 1.25 + 4.25.
Watch out: both numbers must be smaller than the total.
Cara
Pilih satu nombor, kemudian tolak
18.435 − 9.2
| 1 | 8 | . | 4 | 3 | 5 | |
| − | 9 | . | 2 | 0 | 0 | |
| 9 | . | 2 | 3 | 5 |
9.2 + 9.235 = 18.435 ✔
10 + 8.435 = 18.435 ✔
10 + 8.435 = 18.435 ✔
先选一个再减 = pilih satu, kemudian tolak
先随便选一个数，例如 9.2，另一个数就是 18.435 − 9.2 = 9.235。如果想更容易，可以选整数 10，另一个数就是 8.435，一眼就看出来。最后都加一次检查。
例子：□ + □ = 7.36 → 5 + 2.36。
注意：减的时候要把 9.2 写成 9.200 对齐。
choose one, then subtract = pilih satu, kemudian tolak
Choose any first number, such as 9.2; the other number is 18.435 − 9.2 = 9.235. For an easier choice, pick the whole number 10; the other number is 8.435, which you can see at a glance. Always check by adding.
Example: □ + □ = 7.36 could be 5 + 2.36.
Watch out: write 9.2 as 9.200 when lining up to subtract.
Semak
Pasangan manakah jumlahnya 18.435?
检查每一对 = semak setiap pasangan
每一对都要自己加一次：先补 0 让两个数都有三位小数，把小数点对齐，从千分位加起，满十进位；再把结果和题目的和比较，每一位都一样才算对。
例子：3.5 + 2.25 → 3.50 + 2.25 = 5.75。
注意：样子很像的两个小数，数字可能在不同的数位上，例如 0.35 和 0.035 相差很多，一定要补 0 对齐再看。
check each pair = semak setiap pasangan
Add every pair yourself: fill zeros so both numbers have three decimal places, line up the points, add from the thousandths and carry when needed. Then compare with the total in the question; every digit must match.
Example: 3.5 + 2.25 = 3.50 + 2.25 = 5.75.
Watch out: decimals that look alike can have digits in different places, such as 0.35 and 0.035, so fill zeros and line up before comparing.
Ringkasan