Simple mathematical operation: 12 / 17 × 2 / 3 + 2 / 3 △ 17 / 5, 33 / 37 × 36 33 / 37 × 38 13.5×27+13.5×72+13.5 1.5 × 7.4 + 0.6 × 150% + 2 △ two thirds 5.3 × quarter + 2.7 × 25% 0.67×10.1－6.7 23×21.6－2.8×16 5.6×1.7＋0.56×83 No one can write!

Simple mathematical operation: 12 / 17 × 2 / 3 + 2 / 3 △ 17 / 5, 33 / 37 × 36 33 / 37 × 38 13.5×27+13.5×72+13.5 1.5 × 7.4 + 0.6 × 150% + 2 △ two thirds 5.3 × quarter + 2.7 × 25% 0.67×10.1－6.7 23×21.6－2.8×16 5.6×1.7＋0.56×83 No one can write!

12 / 17 × 2 / 3 + 2 / 3 △ 17 / 5 = 8 / 17 + 2 / 3 × 5 / 17 = 24 / 51 + 10 / 51 = 34 / 51 33 / 37 × 36 = 33 / 37 × 37-33 / 37 = 33-33 / 37 33 / 37 × 38 = 33 / 37 × 37 + 33 / 37 = 33 + 33 / 37 slow typing on mobile phone

Simple calculation of 1 / 17 * 16 / 33 + 16 / 17

1/17*16/33+16/17
=16/17(1+1/33)
=16/17 x34/33
=32/33

Recursive equation calculation: 13 / 28 - (17 / 30 - 15 / 28 + 7 / 30)

13/28- ( 17/30 - 15/28 + 7/30 )
=13/28- 17/30 +15/28 - 7/30
=(13/28+15/28)-(17/320+7/30)
=1-24/30
=1-4/5
=1/5

How to use 14 out of 15 times 7 out of 17 times 5 out of 28 times 17?

14 out of 15 times 7 out of 17 times 5 out of 28 times 17
=（14/15×5/28）×（7/17×17）
=1/6×7
=7/6