Calculation: 99 9 (2008 9) × 99 9 (2008 9) + 99 9 (2008 9) Urgent demand!!!

Calculation: 99 9 (2008 9) × 99 9 (2008 9) + 99 9 (2008 9) Urgent demand!!!

99… 9 (2008 9) × 99 9 (2008 9) + 99 9 (2008 9)
=99… 9 (2008 9) × 99 × (99 9 (2008 9) × 99 + 1)
=99… 9 (2008 9) × 99 × 10 ^ 2008
=99… 900… 0 (2008 9 followed by 2008 0)

10-1 / 2 * 10 / 11 =? 4 / 25 * 101-4 / 25 =? 98 * 2 / 99 =? 2008 / 2009 * 2008 =? If you want to simplify the calculation, you can't do without points

10-1 / 2 * 10 / 11 = 10-5 / 11 = 9 and 6 / 11
4/25*101-4/25=4/25*(101-1)= 4/25*100=16
98 * 2 / 99 = (99-1) * 2 / 99 = 2-2 / 99 = 1 and 97 / 99
2008 / 2009 * 2008 = 2008 / 2009 * (2009-1) = 2008-2008 / 2009 = 2007 and 1 / 2009

In 1997 * 2010 + 20101998 * 2009 + 20091999 * 2008 + 2008, the maximum formula is

The biggest formula is 1999 * 2008 + 20081997 * 2010 + 2010 = 1998 * 2010 = (1999-1) * (2009 = 1) = 1999 * 2009-2009 = 1999-1 = 1999 * 2009-111998 * 2009 + 2009 = 1999 * 20091999 * 2008 + 2008 = 000 * 2008 = (1999 + 1) * (2009-1) = 1999 * 2009 + 2009-1999-1 = 1999

A mathematical problem, fast. Half: one third to one fourth into the simplest integer ratio

1/2:1/3:1/4
Multiply the numerator and denominator by 12 to get the answer
=6:4:3

How to calculate 25 * 37 / 43 + 37 * 18 / 43?

25*37/43+37*18/43
=25*37/43+18*37/43
=37/43*(25+18)
=37/43*43
=37

A simple calculation method of 25 * 43 * 877 * 50 * 6

25*43*877*50*6
=25*300*43*(1000-123)
=322500*1000-322500*123
=322500000-36997500
=282832500

Use your brain to calculate 25 × 37 × 4 125 × 7 × 8 25 × 43 × 8 77 × 50 × 6

（1）25×37×4，=25×4×37，=100×37，=3700；（2）125×7×8，=125×8×7，=1000×7，=7000；（3）25×43×8，=25×8×43，=200×43，=8600；（4）77×50×6，=77×（50×6），=77×300，=23100．

How to calculate 32 times 25 times 50

32x25x50
=4x8x25x50
=(4x25)x(8x50)
=100x400
=40000

A simple calculation method of (95.43-3.43) * 1.43

(95.43-3.43)*1.43 = 131.56

How can 4300 / 125 / 8 be regarded as simple

4300÷125÷8
=4300÷（125×8）
=4300÷1000
=4.3