Simple calculation of four fifths × 7.4 + 3.6 × 0.8 - four fifths

Simple calculation of four fifths × 7.4 + 3.6 × 0.8 - four fifths

Simple calculation of four fifths × 7.4 + 3.6 × 0.8 - four fifths
=Four fifths × 7.4 - four fifths x 1 + 3.6 × four fifths
=Four fifths x (7.4 - 1 + 3.6)
=Four fifths x 10
= 8
Wuliangshou Buddha, the Buddha said that the sea of bitterness is endless, looking back is the shore!
Almsgiver, I see that you are a unique talent in the Wulin
If I devote myself to practice, I will become a great tool in the future. I just have a book in my hand, which I want to give to the benefactor
I have a little test, please click next to the answer

1 by 1 / 4 + 4 by 1 / 7 + 7 by 1 / 10 + +91 times 1 / 94 is equal to?

The original formula is 1 / 3 × (1-1 / 4 + 1 / 4-1 / 7 + 1 / 7-1 / 10 +1/91-1/94)
＝1/3 ×(1- 1/94)
＝31/94