Write the simple calculation process (1) 1 and 7 / 3 * 5 / 2 + 2 and 7 / 4 * 5 / 2 + 2 / 5 (2) 2.5 * 12.5 * 3.2 (3) (8 / 2) (3) (7 / 8-7 / 12) * 2.4/1 / 7 (4) 805 * 101-805

Write the simple calculation process (1) 1 and 7 / 3 * 5 / 2 + 2 and 7 / 4 * 5 / 2 + 2 / 5 (2) 2.5 * 12.5 * 3.2 (3) (8 / 2) (3) (7 / 8-7 / 12) * 2.4/1 / 7 (4) 805 * 101-805

（1）2/5（1+3/7+2+4/7+1）=2
(2)2.5x1.25x3.2=2.5x0.4x（1.25x8）=10
（3）(7/8-7/12）x2.4x7=（2.1-1.4）x7=4.9
（4）805（101-1）=80500

Add +, -, *, \, = 24 to 3,5,6,9, but the numbers have to be in this order. What should I do?

3+（5.6）-9=24

How much is bracket 5 / 6 + 5 / 24 multiplied by 12 / 5? It's better to have a calculation process

Bracket 5 / 6 + bracket 5 / 24 times bracket 12 / 5
=(5/6+5/24)*12/5
=5/6*12/5+5/24*12/5
=2+1/2
=2 and 1 / 2
Hope to help you