Question

а) 4×5\25×6 Б) 2×3×4×5\4×5×6×7 в) 9×13+2×9\54×13 г) 8×13\39×2 д) 6×7×8×9×10\7×9×11×12 е)27×15-7×27\9×15-9×11

Answer 1

А4×5/25×6=20/150=4/30
б2×3×4×5/4×5×6=120/120=1
в9×13+2×9/54×13=135/702 дальше калькулятлр в помощь
г 8×13/39×2=104/78

Answer 2

а)

4 × 5 ÷ 25 × 6 = (4 × 5 × 6) ÷ (25) = 120 ÷ 25 = 4.8

б)

2 × 3 × 4 × 5 ÷ (4 × 5 × 6 × 7) = (2 × 3) ÷ (6 × 7) = 6 ÷ 42 = 1 ÷ 7 = 0.14285714286 (rounded to 11 decimal places)

в)

9 × 13 + 2 × 9 ÷ (54 × 13) = (9 × 13 + 2 × 9) ÷ (54 × 13) = 123 ÷ 702 = 0.17521367521 (rounded to 11 decimal places)

г)

8 × 13 ÷ (39 × 2) = (8 × 13) ÷ 78 = 104 ÷ 78 = 4 ÷ 3 = 1.3333333333 (rounded to 11 decimal places)

д)

6 × 7 × 8 × 9 × 10 ÷ (7 × 9 × 11 × 12) = (6 × 8 × 10) ÷ (9 × 11 × 12) = 480 ÷ 1188 = 0.40404040404 (rounded to 11 decimal places)

е)

27 × 15 - 7 × 27 ÷ (9 × 15 - 9 × 11) = (27 × 15 - 7 × 27) ÷ (9 × 15 - 9 × 11) = 243 ÷ 18 = 13.5