Simple calculation! 1.2.5 × 9.82.1.25 × 25 × 3.2 3.2.4-1.375 + 3 / 5, 4.3 / 1 △ 3 / 7 × 5 / 14

Simple calculation! 1.2.5 × 9.82.1.25 × 25 × 3.2 3.2.4-1.375 + 3 / 5, 4.3 / 1 △ 3 / 7 × 5 / 14

1.2.5×9.8
=2.5x(10-0.2)
=2.5x10-2.5x0.2
=25-0.5
=24.5
2.1.25×25×3.2
=(1.25x8)x(0.4x25)
=10x10
=100
3.2.4-1.375 + 3 / 5
=2.4-+0.6-1.375
=3-1.375
=1.625
1 / 4 / 3 / 7 × 5 / 14
=1/3x7/3x5/14
=5/18