Simple calculation 7250÷125=? 125x11x8x7=? 88x25=?

Simple calculation 7250÷125=? 125x11x8x7=? 88x25=?

7250÷125=1450÷25=290÷5=58
125x11x8x7=125x8x11x7=1000×77=77000
88x25=25x4×22=100×22=2200
7250÷125=58
125x11x8x7=77000
88x25=2200
A series of numbers 1,1,1,2,2,3,4,5,6,7,9,12,16,21 are called Padova sequence. What is the 20th number?
Padova sequence is 1,1,1,2,2,3,4,5,7,9,12,16,21,28,37,49,6... It starts from the fourth term, each term is the sum of the first two terms and the first three terms. That is, x = (X-2) + (x-3), X is the ordinal of the term (x > 4). 1,1,1,2,2,3,4,5,7,9,12,16,21,28,37,49,65,86114,15
A fairy tale book, the first day read one ninth, the second day read 25 pages, the second day and the first read is 1:4, how many pages does this book have?
In a story book, Xiao Li read 1 / 9 of the whole book on the first day and 25 pages on the second day. The ratio between the two days' reading and the number of pages in the whole book is 1:4. The book has (180) pages in total
I read the whole book in two days: 1 / 4 = 1 / 4
The next day I read the book: 1 / 4-1 / 9 = 5 / 36
The book has a total of: 25 △ 5 / 36 = 180 pages
Simple calculation
Simple calculation of 101 times 99
Time limited
101×99
=（100+1）（100-1）
=100²-1²
=10000-1
=9999
101×99=（100+1）（100-1）
=100 Square-1
=9999
(100+1)*99=100*99+99=9999
101x99
=（100+1）x99
=100x99+1x99
=9900+99
=9999
100*99+99=9999
Find the Padova sequence 1,1,1,2,2,3,4,5,6,7,9,12,16 in C + + program (1). Find the sum of the first twenty items
int a=1,b=1,c=1,i,sum=3,x;
for(i=4;i
Xiao Li read a fairy tale book. On the first day, she read 3 / 11 of the book, on the second day, she read 4 / 11, and on the third day, she began to read from page 141. How many pages does this fairy tale book have?
220 pages 141-1 = 140 140 (3 / 11 + 4 / 11) = 20 × 11 = 220 (pages)
Simple calculation of Three Mathematical Olympiad problems
1 444*25/(100/8.9)+1889*8.9
2 (112244-123.234）/（224488-246.468)
3 4.8*2.12+0.627*52+41.5*0.08
The previous 1 2 3 is the question number
1.shizi=111*25*4*8.9/100+1889*8.9
=111*8.9+1889*8.9
=(111+1889)*8.9
=2000*8.9
=17800
2.(112244-123.234）/（224488-246.468)
=(112244-123.234)/(112244*2-123.234*2)
=(112244-123.234）/[(112244-123.234）*2]
=1/2=0.5
3.4.8*2.12+0.627*52+41.5*0.08
=48*0.212+52*0.627+8*0.415
=40*0.212+8*0.627+52*0.627
=40*0.212+60*0.627
=8.48+37.62
=46.1
How many numbers in a sequence: - 344,17, - 2,5, (), 65?
-344 is equal to the third power of - 7 minus 1; 17 is equal to the square of - 4 plus 1; - 2 is equal to the third power of - 1 minus 1; 5 is equal to the square of 2 plus 1; 65 is equal to the square of 8 plus 1. We can see that it is a hidden sequence - 7, - 4, - 1,2, (), 8 and the odd cubic - 1, even square + 1. The hidden sequence is an arithmetic sequence
four thousand five hundred and forty-six
-Question: is there any way to solve the problem? Write it down. Thank you!
Xiao Li read a fairy tale book. On the first day, she read 3 / 11 of the whole book. On the second day, she read 4 / 11 of the whole book. On the third day, she began to read 141 pages. How many pages does this fairy tale book have?
(141-1) / (3 / 11 + 4 / 11) = 220
How to divide 400 by 1.25
400÷1.25
=40×1000÷125
=40×(1000÷125)
=40×8
=320
1.25=10/8
400/1.25=400/10 * 8 = 40 * 8 = 320
400÷1.25=400÷(5/4)=400×（4/5）=320