(-7) + 12 = ?

3/4 + 1/8 = ?

0.6 × 0.3 = ?

25% of 200 = ?

The perimeter of a rectangle 8 m × 5 m is:

Simplify: 2x + 3x

If a pen costs 1,500 riel, 4 pens cost:

Which number is prime?

The area of a square with side 6 cm is:

12 ÷ 4 + 2 × 3 = ?

Round 3.86 to one decimal place:

A bag has 3 red and 2 blue balls. The fraction of red balls is: