=(99-100+1)x3628800

=0x3628800

=0

(123 + 123 + 224) x 10 * 100 : 10000 = 47

(123+123+224)x10*100:10000=47

a: \(A=\dfrac{63-48-70}{84}:\dfrac{-3\cdot84+4\cdot60+5\cdot70}{840}\cdot\dfrac{1-14}{12}\)

\(=\dfrac{-55}{84}\cdot\dfrac{840}{338}\cdot\dfrac{-13}{12}=\dfrac{55}{1}\cdot\dfrac{10}{338}\cdot\dfrac{13}{12}=\dfrac{275}{156}\)

b: \(=-234\cdot123+123\cdot4356-123\cdot2312+234\cdot123-234\cdot2312+2312\cdot234+2312\cdot123\)

\(=123\cdot4356-123\cdot2312+123\cdot2312=123\cdot4356=535788\)

M=4⁸:9⁸+6⁹x120/8⁴x3¹²-6¹¹

M=(2²)⁸:(3²)⁸+6⁹x2³x3x5/(2³)⁴x3¹²-6¹¹

M=2¹⁶:3¹⁶+6⁹x2³x3x5/2¹²x3¹²-6¹¹

M=(2¹⁹:3¹⁷+6⁹⁾x5 / 2¹²x3¹²-6¹¹

M=2⁷:3⁵x5/6²

M=128/243x5:36

M=640/243:36

M=160/2187

51123 +6123114 

=\(\frac{616}{123}+\frac{269}{38}=12,08707745\)

  13 x 27 +26 x 35 +13 x 4 - 13

=13 x 27 + 2 x 13 x 35 + 13 x 4 -13 x 1

=13x(27+(2x35) + 4 - 1)

=13x(27+70+4-1)

=13 x 100

=1300

    13x27+26x35+13x4-13

  =351   +   910 +52   -13

  =     1261       +52   -13

  =          1313       -13

   =                    1300

tính vế trên trước: 2^12 x 3^5 - 4^6 x 9^2 = 4096 x 243 - 4096 x 81 = 4096 x ( 243 - 81 ) = 663552.

tính vế dưới sau : ( 2^2 x 3 )^6 + 8^4 x 3^5 = ( 4 x 3 )^6 + 4096 x 243 = 12^6 + 995328 = 2985984 + 995328 = 3981312.

Vậy được: 663552/3981312 = 1/6.

Câu a:

A = (1\(\frac16\) x \(\frac67\) x 6 : \(\frac35\)) : (4\(\frac15\) x \(\frac{10}{11}\) + 5\(\frac{2}{10}\))

A = (7/6 x 6/7 x 6 x 5/3) :(21/5 x 10/11 + 52/10)

A = (1 x 6 x 5/3) : (210/55 + 26/5)

A = 10 : (210/55 + 286/55)

A = 10 : (496/55)

A = 10 x 55/496

A = 275/248

Câu b:

B = \(1\)\(\frac{13}{15}\) x 25% x 3 + (8/15 - 79/60) : 1\(\frac{23}{4}\)

B = 28/15 x 1/4 x 3 + (32/60 - 79/60) : 27/4

B = 7/15 x 3 - 47/60 x 4/27

B = 7/5 - 47/405

B = 104/81