Year review: measures, geometry, coordinates, sets; logic problems
Answers are for parents and teachers.
1
Calculate 5 kg 400 g − 2 kg 700 g in grams.
2700
2
A cuboid is 10 cm long, 6 cm wide and 3 cm high. What is its volume in cm³?
180
3
A square has side 12 cm. What is its area in cm²?
144
4
Check the trick with the number 9: double it, add 10, halve it, subtract 9. What do you get?
5
5
A class has 28 children and each goes to the drawing or the chess club. 17 go to drawing and 15 to chess. How many go to both?
4