IKMC 2027 - Grades 5-6 - Self-study SET 14 - Thematic Batch 3 Question 30

Bon has two coupons for Mrs Brown’s cake shop: one subtracts 20 thousand đồng and the other gives 50% off. A cake costs 60 thousand đồng, and both coupons may be applied successively. What is the least he can pay?