Simple calculation: 1.8 × (4-3.8) × 5 ／ 0.01 14.4 ／ [(3.94 + 0.86) × 0.5]

Simple calculation: 1.8 × (4-3.8) × 5 ／ 0.01 14.4 ／ [(3.94 + 0.86) × 0.5]

1.8×(4-3.8)×5÷0.01
=1.8×0.2×5÷0.01
=1.8÷0.01x(0.2×5)
=180
14.4÷[(3.94+0.86)×0.5]
=14.4÷(4.8×0.5)
=14.4÷2.4
=6

Simple calculation of 0.86 + 8.6 × 9.9

0.86＋8.6×9.9
=8.6x0.1+8.6x9.9
=8.6x(0.1+9.9)
=8.6x10
=86

(8.1-5.4) △ 3.6 + 85.7,
And 3.5-3.5x0.98

（8.1－5.4）÷3.6+85.7
=2.7÷3.6+85.7
=0.75+85.7
=86.45
3.5-3.5x0.98
=3.5x(1-0.98)
=3.5x0.02
=0.07

How to calculate (3.6 × 1 / 2 / 5 × 4) / (0.35 × 1.8 × 1 / 2)?

（3.6×1/2/5×4）÷（0.35×1.8×1/2）
=（3.6×5/2×4）÷（0.35×0.9）
=（3.6×10）÷（0.35×0.9）
=（3.6×10×1000）÷（0.35×0.9×1000）
=(36×1000)/(35×9)
=800/7