Математика помогите плиз
1. 15-11,50 = 15,00 - 11,50 = 3,50 2. 13,9-6,815 = 13,900-6,815 = 7,085 3. 48-16,81 = 48,00-16,81 = 31,19 4. 4-2,97 = 4,00-2,97 = 1,03 5. 81,61-68,8 = 81,61-68,80 = 12,81 6. 12-4,812 = 12,000-4,812 = 7,188 7. 50-28,8 = 50,0-28,8 = 21,2