To solve the equation: half + x = 5 / 6 x - 7 / 10 = 1 / 5 x + 1 / 4 = 1 / 2 List the process

To solve the equation: half + x = 5 / 6 x - 7 / 10 = 1 / 5 x + 1 / 4 = 1 / 2 List the process

Half + x = five sixths
X=5/6 -1/2
X=1/3
X - seven tenths = one fifth
X=1/5+7/10
X=9/10
X + quarter = half
X=1/2 -1/4
X=1/4

One half plus one sixth plus one twelfth plus one twentieth plus one thirtieth... Plus one 9900
1 / 2-1 / 3 is equal to 1 / 6, 1 / 3-1 / 4 is equal to 1 / 12, 1 / 4-1 / 5 is equal to 1 / 20

Original form
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+.+1/99-1/100
=1-1/100
=99/100

Observe the number of this column: 3, 4, 7, 11, 18, 29, 47, 76, 123 ············································································?
Make it clear~~~

After observation, it is found that every number comes from the addition of the first two numbers. The remainder of the first six numbers divided by 4 is 3,0,3,3,2,1 in turn. This is true for every six numbers. Then 1999 is divided by 6 and the remainder is 1, so the remainder of the 1999 number divided by 4 is 3

A number minus the product of 4 × 6, and then divided by 3 to get 20, this number is?

Let this number be X
（x-4*6）/3=20
x-4*6=60
x=60+24
x=84
It's too simple

6.58 minus 1.89 divided by 0.35, the difference is 0.96, what is the result

(6.58-1.89/0.35)+0.96
=(6.58-5.4)+0.96
=1.18+0.96
=2.14

What is the quotient of the sum of 5 / 9 times 3 / 10 plus 2 / 7 divided by 2 / 5?

5/9*3/10+(2/7)/(2/5)
=1/6+2/7*(5/2)
=1/6+5/7
=37/42

The quotient of a divided by B is 6.7. If B is 10 times the original, then the quotient is ()

6.7÷10=0.67
The quotient is 0.61

What is the product of 125 and 8 minus the quotient of 12 divided by 6

1000-（12/6）=998

What's the difference between the product of 12 times 13 and the quotient of 12 divided by 13?

12 △ 13-12 × 13, = 36-4, = 32

Divide the sum of 270 and 450 by 12 to get the product of the quotient multiplied by 3

（270+450）÷12×3
=720÷12×3
=60×3
=180