Xiao Li read a story book. She read 120 pages three days ago. She stood at four ninths of the book. How many pages does the story book have? (solving equation)

Xiao Li read a story book. She read 120 pages three days ago. She stood at four ninths of the book. How many pages does the story book have? (solving equation)

Set a total of X pages
4/9x=120
x=120÷4/9
x=270
56^2+44^2+56×88
It is easy to calculate by factorization,
This is a complete square
56^2+44^2+56x88=56^2+44^2+2*56*44=(56+44)^2=100^2=10000
56×2+44×2+56×88
=（56+44）×2+56×88
=100×2+4928
=200＋4928
=5128
56^2+44^2+56x88=(56+44)^2=100^2=10000
What are the Chinese characters in the formula?
3 good + friends 8 = 8 friends 30 + 58 = 88 good = 0 friend = 5 friend = 831 + 58 = 89 good = 1 friend = 5 friend = 932 + 48 = 80 good = 2 friend = 4 friend = 033 + 48 = 81 good = 3 friend = 4 friend = 134 + 48 = 82 good = 4 friend = 4 friend = 235 + 48 = 83 good = 5 friend = 4 friend = 336 + 48 = 84 good = 6 friend = 4 friend = 437 + 48
Three hundred and eighty-eight
There are many kinds! Just like what I said upstairs, they are all right!
There are two answers
31+58=89；
30+58=88；
29+58=87；
28+58=86；
27+58=85；
26+58=84；
25+58=83；
24+58=82；
23+58=81；
22+58=80。
That's the answer! Nothing else!
I made it myself!
Xiao Li read a story book. She read 18 pages a day for the first five days and 210 pages a day for the last nine days. How many pages a day does Xiao Li read on average?
There is also the second question: the school organized students to donate 650 yuan to the earthquake stricken areas, 150 yuan less than twice of the fifth grade paper. How much yuan should the fifth grade donate? The third question: a construction team plans to lay 2400 meters of rail in 50 days, but in fact, 12 meters more than the plan every day. How many days can the rail be paved?
Question 1 (18x5 + 210) / (5 + 9)
Question 2 (650 + 150) / 2
Question 3 2400 / (2400 / 50 + 12)
Take off the formula calculation. Can simple want simple operation
2.87×〔6.3-2.3〕
54.7-45.3÷15
2.008×1999+2.008
10.8÷〖〔5.28-1.68〕×0.3〗0.5
3.69÷〔1.23×0.5〕
2.87×〔6.3-2.3〕=2.87×4.0=11.48 54.7-45.3÷15=54.7-3.02=51.68 2.008×1999+2.008=4013.992+2.008=4016 10.8÷〖〔5.28-1.68〕×0.3〗0.5=10.8÷（3.6×0.3）×0.5=10.8÷1.08×0.5=10×0.5=5 3.69÷〔1.23×0....
2.87×〔6.3-2.3〕
=(3-0.13)×4
=12-0.13×4
=12-0.52
=11.48
54.7-45.3÷15
=54.7-(45+0.3)\15
=54.7-45\15-0.3\15
=54.7-3-0.02
=51.68
2.008×1999+2.008
=2.008 * (1999 + 1
2.87×〔6.3-2.3〕
=(3-0.13)×4
=12-0.13×4
=12-0.52
=11.48
54.7-45.3÷15
=54.7-(45+0.3)\15
=54.7-45\15-0.3\15
=54.7-3-0.02
=51.68
2.008×1999+2.008
=2.008*(1999+1)
=2.008*2000
=4016
10.8÷〖〔5.28-1.68〕×0.3〗0.5
=10.8*0.3*0.5\[(5+0.28)-(2-0.32)]
=10.8\（3.6*0.3）*0.5
=10.8\1.08*0.5
=10*0.5
=5
3.69÷〔1.23×0.5〕
=3*1.23\(1.23*0.5)
=3\0.5
=6. Put it away
2.87×〔6.3-2.3〕
=2.87×4.0
=11.48
54.7-45.3÷15
=54.7-3.02
=51.68
2.008×1999+2.008
=2.008×(1999+1)
=2.008×2000
=4016
10.8÷〖〔5.28-1.68〕×0.3〗0.5
=10.8 △ (3.6 × 0... Expansion)
2.87×〔6.3-2.3〕
=2.87×4.0
=11.48
54.7-45.3÷15
=54.7-3.02
=51.68
2.008×1999+2.008
=2.008×(1999+1)
=2.008×2000
=4016
10.8÷〖〔5.28-1.68〕×0.3〗0.5
=10.8÷（3.6×0.3）×0.5
=10.8÷1.08×0.5
=10×0.5
=5
3.69÷〔1.23×0.5〕
=3.69÷1.23÷0.5
=3÷0.5
=6
For reference only, please put it away
2.87×〔6.3-2.3〕
=2.87×4.0
=11.48
54.7-45.3÷15
=54.7-3.02
=51.68
2.008×1999+2.008
=2.008×(1999+1)
=2.008×2000
=4016
10.8÷〖〔5.28-1.68〕×0.3〗0.5
=10.8 △ (3.6 × 0... Expansion)
2.87×〔6.3-2.3〕
=2.87×4.0
=11.48
54.7-45.3÷15
=54.7-3.02
=51.68
2.008×1999+2.008
=2.008×(1999+1)
=2.008×2000
=4016
10.8÷〖〔5.28-1.68〕×0.3〗0.5
=10.8÷（3.6×0.3）×0.5
=10.8÷1.08×0.5
=10×0.5
=5
3.69÷〔1.23×0.5〕
=3.69÷1.23÷0.5
=3÷0.5
=6
I hope my answer will help you! Put it away
In the following numbers, different Chinese characters represent different numbers, and the same Chinese characters represent the same numbers. If Qiao + Jie + Shu + Zi + Mi = 30, please write the numbers. The formula is as follows: five enigmas in one digit equals MI, four characters in ten digit equals character, three numbers in hundred equals number, two enigmas in thousand equals solution, and one match in ten thousand equals Qiao
As shown in the picture!
Xiao Li has read one third of a story book. If she reads another 120 pages, she will have as many pages left as she has read. How many pages does this book have
Let the number of pages be x, then the formula is x = 2 (x / 3 + 120), and the solution is x = 720
A: the total number of pages is 720,
1: I read one third of the book for the first time, that is 240 Pages,
2: Read another 120 pages (i.e. 240 + 120 = 360 pages),
3: Finally, the number of unread pages left is 360 (720-360 = 360)
Two simple operations
(3/8+3/43)*8+27÷43
2 and 3 / 4 * 2.4 △ (2.75 * 2 / 5 * 0.6)
A car can load 50 tons of iron and 15 tons of coal. Once iron and coal are loaded, the weight of iron is five times that of coal. How many tons of goods are loaded this time?
180 / 43 10 36 tons
How to do 1-2-3 + 4 + 5-6-7 + 8 ~ + 201-202-203 + 204
A total of 204 / 2 - 1, for - 102
A story book has 96 pages. Xiaolan read 43 pages. The remaining pages are 5 pages more than half of the whole book. The remaining pages are 15 pages less than 3 / 4 of the whole book
Which of them is right? Why?