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a, (-0,2)² \(\times\) 5 - \(\dfrac{2^{13}\times27^3}{4^6\times9^5}\)

= 0,04 \(\times\) 5 - \(\dfrac{2^{13}\times3^9}{2^{12}\times3^{10}}\)

= 0,2 - \(\dfrac{2}{3}\)

= \(\dfrac{2}{10}\) - \(\dfrac{2}{3}\)

=  - \(\dfrac{7}{15}\)

b, \(\dfrac{5^6+2^2.25^3+2^3.125^2}{26.5^6}\)

 = \(\dfrac{5^6+4.5^6+8.5^6}{26.5^6}\)

= \(\dfrac{5^6.\left(1+4+8\right)}{26.5^6}\)

= \(\dfrac{1}{2}\)

a, (-0,2)2 $\times$ 5 - 213×27346×9546×95213×273​

= 0,04 $\times$ 5 - 213×39212×310212×310213×39​

= 0,2 - 2332​

= 210102​ - 2332​

=  - 715157​

b, 56+22.253+23.125226.5626.5656+22.253+23.1252​

 = 56+4.56+8.5626.5626.5656+4.56+8.56​

= 56.(1+4+8)26.5626.5656.(1+4+8)​

= 1221​
 

 a) 652 + 327 + 148 + 73 = ( 652 + 148) +( 327+73) = 800+400 =1200

 b) 19 x 16 x 4 + 76 x 34 = ( 19 x 4 ) x 16 + 76 x 34 = 76 x 16 + 76 x 34 = 76 x( 16+34 ) = 76 x 50= 3800

 c) 136 x 68 + 16 x 2 x 136 = 136 x ( 68 + 32 ) = 136 x 100 = 13600

 d) 45 x 125 - 45 x 25 + 55 x 31 + 55 x 69 = 46 x ( 125-25) + 55 x ( 31+69) = 46 x100 + 55x 100 = 4600 + 5500 = 10100  

 e) 125 x 25 + 125 x 74 + 125 = 125 x( 25+74 +1 ) = 125 x 100 =12500

 f) 43,5 x 2015 x ( 630 - 315 x 2 ) = 43,5 x 2015 x 0 = 0 

 g) 0,2 x 41 x 36 + 0,8 x 9 x 58 + 1,2 x 6

= 0,2 x4 x41x 9 + 0,8 x 9 x 58  +7,2

=  (0,8 x9)x 41 + ( 0,8 x 9) x 58   + 7,2 x 1 

= 7,2 x 41 + 7,2 x 58 + 7,2 x 1 

= 7,2 x( 41+58+1)

= 7,2 x 100 = 720.

a) 652 + 327 + 148 + 73

=(73+327)+(652+148)

=400+800

=1200

b) 19 x 16 x 4 + 76 x 34

=76*16+76*34

=76*(16+34)

=76*50

=3800

c)136*68+16*2*136

=136*68+32*136

=136*(68+32)

=136*100

=13600

d)45*125-45*25+55*31+55*69

=45*(125-25)+55*(31+69)

=45*100+55*100

=100*(45+55)

=100*100

=10 000

e)125*25+125*74+125

=125*(25+75+1)

=125*100

=12 500

còn lại bạn tự làm đi mk mỏi tay lắm rồi

a) 652 + 327 + 148 + 73 = ( 652 + 148) +( 327+73) = 800+400 =1200

b) 19 x 16 x 4 + 76 x 34 = ( 19 x 4 ) x 16 + 76 x 34 = 76 x 16 + 76 x 34 = 76 x( 16+34 ) = 76 x 50= 3800

c) 136 x 68 + 16 x 2 x 136 = 136 x ( 68 + 32 ) = 136 x 100 = 13600

d) 45 x 125 - 45 x 25 + 55 x 31 + 55 x 69 = 46 x ( 125-25) + 55 x ( 31+69) = 46 x100 + 55x 100 = 4600 + 5500 = 10100 

( 8 - 0,2 ) x 10 - 125 : 25

= 7,8 x 10 - 5

= 78 - 5

= 73

có ai giúp mình với 

alooooooooooooooooooo

a) \(\frac{8^{10}}{4^8}=\frac{\left(2^3\right)^{10}}{\left(2^2\right)^8}=\frac{2^{30}}{2^{16}}=2^{14}=16384.\)

b) \(\frac{\left(0,2\right)^{10}}{\left(0,2\right)^5}=\left(0,2\right)^5=\frac{1}{3125}.\)

c) \(\frac{50^3}{125}=\frac{50^3}{5^3}=10^3=1000.\)

Chúc bạn học tốt!

124. 4=500

a, = -500

b,=-500

c,= -500

125. 4=500

a.125. 4 =500

=> (-125). 4= -500

b.125. 4=500

=> (-4). 125= -500

c.125. 4=500

=> 4. (-125) = -500

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