=36* 1 1 1+8* 1 1 1*8
=36* 1 1 1+ 1 1 1*64
= 1 1 1*(36+64)
= 1 1 1* 100
= 1 1 100
32* 165- 16*64*2-32
=32* 165-( 16*2)*64-32
=32* 165-32*64-32* 1
=32*( 165-64- 1)
=32* 100
=3200
9999×2222+3333×3334
=3333×(3×2222)+3333×3334
=3333×6666+3333×3334
=3333×(6666+3334)
=3333× 10000
=33330000
1+2-3-4+5+6-7-8+…… 1977+ 1978- 1979- 1980+ 198 1
=( 1+2-3-4)+(5+6-7-8)+....+( 1977+ 1978- 1979- 1980)+ 198 1
=-4-4-....-4+ 198 1
=-4×495+ 198 1
= 1
6.3×( 14.8-6.5)+46.5×(4.5+5.5)+8.3×3.7
=6.3×8.3+46.5× 10+8.3×3.7
=8.3×(3.7+6.3)+465
=8.3× 10+465
=83+465
=548
There are many red balls and white balls in the bottle. The number of red balls in the bottle accounts for one third of the total, and three red balls are put in. Red balls now account for five thirteenth of the total. Do you know how many red balls and white balls there used to be?
Solution: If the total number is X, the original number of red balls is 1/3x, and after adding three red balls it is 5/ 13x.
1/3x+3=5/ 13x(x+3)
X=36, then1/3x =12,36-12 = 24.
A: Red ball 12, white ball 24.
2/ 1*2= 1 3/ 1*3= 1 3/2*3=2 3/ 1*6=2
4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35
4/3* 16= 12 9/5*27= 15 2/ 1*30= 15 12/7*24= 14
30/ 1*30= 1 5 1/9* 102= 18 19/9*76=36 4/9*8= 18
5/8*90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4
10/ 1*90=9 5/3* 105=63 19/7*38= 14 5/ 1*25=5
8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8
9/7* 18= 14 25/7* 100=28 9/5*8 1=45 8/9* 16= 18
There is a batch of grain in the warehouse. After 20%, 20 tons. At this time, the ratio of grain to raw grain in the warehouse is 28: 25. How many tons of grain are there in the warehouse now?
Solution 1
There used to be a batch of x tons of grain in the warehouse, but now there is x*( 1-20%)+20 tons of grain in the warehouse.
So (x * (1-20%)+20)/x = 28/25.
Or (x * (1-20%)+20) = 28x/25.
X = 62.5 tons.
So now there is X * (1-20%)+20 = 62.5 * (1-20%)+20 = 70 tons of grain in the warehouse.
Xiaoming and Xiaoyu each have some stamps. If Xiao Ming gives his own stamp110 to Xiao Yu, then the number of stamps is equal. What percentage are Xiaoyu's stamps less than Xiaoming's?
Xiao Ming gave his own stamp110 to Xiao Ming, so the number of stamps is equal, so Xiao Ming still has his own 9/ 10, and Xiao Ming adds up his10 as much as Xiao Ming's 9/ 10, which shows that Xiao Ming.
Therefore, the light rain is less than Xiao Ming's:
[ 1-(8/ 10)]÷ 1=20%
Sun Hotel had a turnover of 250,000 in September, leaving 237,500 after paying taxes. What is the tax rate of this hotel?
Tax rate =(250000-237500)÷250000=5%
Students in Grade Four, Grade Five and Grade Six of Qiongshan No.2 Primary School 165. There are twice as many students in grade four as in grade five. How many students are there in Grade Four and Grade Five respectively?
Suppose the fifth grade is X, then the fourth grade is 2x-6.
According to the meaning of the question,
x+2x-6= 165
The solution is x=57.
So there are 108 students in grade four and 57 students in grade five.
I did an extra performance in the sixth grade.
A, B and C plant trees. A planted half of B and C, B planted a third of A and C, and C planted 130 trees. How many trees did A and B plant respectively?
A is of three races.
1 ÷ ( 1+2) = 1 in 3。
B planted three people.
1 ÷ (1+3) = 1 times 4.
C planted three people.
1-31-41=12 5.
Three people * * * planted.
130 65438+5/02 = 312 trees
One planted it.
312× 31=104 tree
B planting
3 12×4 1 = 78 trees