a; (-2,5.0,38.0,4) - {0,125.3,15.(-8)}

= (-2.5.0,4).0,38 - {-8.0,125.3,15}

= - 1.0,38 - {-1.3,15}

= -0,38 + 3,15

= 2,77

b; {(-20,83).0,2 + (-9,17).0,2 : {2,47.0,5 - (-3,53.0,5}

= {0,2.(-20,83 - 9,17)}: {0,5.(2,47 + 3,53)}

= {- 0,2.30}:{0,5.6}

= - 6:6 : 0,5

= -1 : 0,5

= - 2 

\(\frac{0,8\times0,4\times1,25\times2,5\times31,8+68,2}{0,1\times12,5\times4\times2,5\times2\times8\times0,2\times5}\)

\(=\frac{\left(0,8\times1,25\right)\times\left(0,4\times2,5\right)\times31,8+68,2}{0,1\times\left(12,5\times8\right)\times\left(4\times2,5\right)\times2\times\left(0,2\times5\right)}\)

\(=\frac{1\times1\times31,8+68,2}{0,1\times100\times10\times2\times1}\)

\(=\frac{31,8+68,2}{0,1\times100\times10\times2\times1}=\frac{100}{200}=\frac{1}{2}\)

yx(2,5+4,1+0,2)=2,72

yx6,8=2,72

y=2,72:6,8

y=0,4

a: \(=\left(1.25\right)^{16}\cdot8^{16}\cdot8=8\)

b: \(=\left(2.5\right)^9\cdot4^9\cdot4^6=4^6\cdot10^9\)

Bài 1 . Tính nhanh

a) 8,32 x 4 x 25

= 8,32 x ( 4 x 25 )

= 8,32 x 100

= 832

b) 2,5 x 5 x 0,2 

= 2,5 x ( 5 x 0,2 )

= 2,5 x 1

= 2,5

c) 0,8 x 1,25 x 0,29

= ( 0,8 x 1,25 ) x 0,29

= 1 x 0,29

= 0,29

d) 9,2 x 6,8 - 9,2 x 5,8

= 9,2 x ( 6,8 - 5,8 )

= 9,2 x 1

= 9,2

1.832

2.2,5

3.0,29

4.9,2

8,32.4.25=8,32.100=832

2,5.5.0,2=0,5.5=2,5

0,8.1,25.0,29=0,29.1=0,29

9,2.6,8-9,2.5,8=9,2.(6,8-5,8)=9,2

a: \(=\left(1.25\right)^{16}\cdot8^{16}\cdot8=8\cdot10^{16}\)

b: \(=\left(\dfrac{5}{2}\right)^{13}\cdot4^{13}\cdot4^2=10^{13}\cdot4^2\)

c: \(=\left(0.25\right)^4\cdot8^4\cdot8^2=2^4\cdot8^2=64\cdot16=1024\)

d: \(=\left(\dfrac{1}{2}\right)^{15}\cdot2^{18}=2^3=8\)

e: \(=\left(\dfrac{1}{3}\cdot6\right)^7\cdot\left(\dfrac{1}{2}\right)^7\cdot\dfrac{1}{2}=2^7\cdot\left(\dfrac{1}{2}\right)^7\cdot\dfrac{1}{2}=\dfrac{1}{2}\)

a: =5,3+5,1-5,3+4,9=10

b: =2,7-51,4-48,6+7,3

=10-100=-90

c: =2,5(-0,124+10,124)=2,5x10=25

d: =6,3-6,3+4.9=4,9

e: =15,3-21,5-4,5=-10,7

a: =5,3+5,1-5,3+4,9=10

b: =2,7-51,4-48,6+7,3

=10-100=-90

c: =2,5(-0,124+10,124)=2,5x10=25

d: =6,3-6,3+4.9=4,9

e: =15,3-21,5-4,5=-10,7

a,0.8*0.4*1.25*25+31.8+68.2*0.1*12.5*4*2.5*8*0.2*5=1100000

Các bạn giải ra hộ mình nhé

Mình cần trong 2 hoặc 2 tiếng rưỡi nhé ,thank you ,cảm ơn các bạn nhiều thật là nhiều!