☰ Contents · Mathematics

Union of sets, problems with sets, statements, logic problems

Lessons 143–146 · 4 lessons · I.V. Repyova. Mathematics Grade 3, Parts 1–4. Novda Edutainment, 2023
Answers are for parents and teachers.
1
A = {1, 2, 3, 4, 5}, B = {4, 5, 6}. Write A ∪ B and A ∩ B.
2
In a class 16 children play chess and 13 play draughts, and 7 play both. How many children play at least one of the games?
3
Is the statement “A cube has 8 vertices” true or false?
4
Turn the false statement “6 × 9 = 56” into a true one.
5
Write all three-digit numbers made from the digits 1, 2, 3 with no repeats.