đéo biết

a) \(2\frac{2}{5}\cdot\frac{25}{18}=\frac{12}{5}\cdot\frac{25}{18}=\frac{300}{90}=\frac{10}{3}\)

b) \(\frac{9}{11}:2\frac{5}{2}\cdot2\frac{3}{4}=\frac{9}{11}.\frac{2}{9}\cdot\frac{11}{4}=\frac{1}{2}\)

c) \(10:\frac{35}{24}:\frac{36}{7}=10\cdot\frac{24}{35}\cdot\frac{7}{36}=\frac{4}{3}\)

d) \(10,77\cdot9,8+5,23\cdot9,8=9,8\cdot\left(10,77+5,23\right)=9,8\cdot16=156,8\)

e) \(1,26\cdot3,6:0,28-6,2=16,2-6,2=10\)

là sao hả cậu?

\(2\frac{2}{5}\) x \(\frac{25}{18}\) = \(\frac{12}{5}x\frac{25}{18}=\frac{10}{3}\)                  x = nhân

\(\frac{9}{11}:2\frac{5}{2}x2\frac{3}{4}\) = \(\frac{9}{11}:\frac{9}{2}x\frac{11}{4}=\frac{2}{11}x\frac{11}{4}=\frac{1}{2}\)

\(10:\frac{35}{24}:\frac{36}{7}=\frac{48}{7}:\frac{36}{7}=\frac{4}{3}\)

\(10,77x9,8+5,23x9,8=\left(10,77+5,23\right)x9,8=156,8\)

\(1,26x3,6:0,28-6,2=4,536:0,28-6,2=16,2-6,2=10\)

bạn nói rõ hơn đi

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37

=(1+37)x37:2

=703

lop 1 khong co cau nay

Kết quả là 703 nha bạn

TL: 

8/15 x 5/6 = 40/90 = 4/9 

41/20 x 3/4 = 123/80 

(11/23 + 9/23) + (18/23 + 2/23) = 20/23 + 20/23 = 40/43 

HT

\(\left(\frac{2}{3}\times\frac{4}{5}\right)\times\frac{5}{6}\) = \(\frac{2}{3}\times\frac{4}{5}\times\frac{5}{6}\)=\(\frac{2\times4\times5}{3\times5\times6}\)=\(\frac{2\times4\times5}{3\times5\times2\times3}\)=\(\frac{4}{9}\)

\(\frac{11}{23}+\frac{2}{23}+\frac{9}{23}+\frac{18}{23}\)=\(\frac{\left(11+9\right)+\left(18+2\right)}{23}\)=\(\frac{20+20}{23}\)=\(\frac{40}{23}\)

\(\frac{27}{12}+\frac{17}{6}-\frac{25}{36}-\frac{15}{6}\)=\(\left(\frac{27}{12}-\frac{25}{36}\right)+\left(\frac{17}{6}-\frac{15}{6}\right)\)=\(\frac{14}{9}+\frac{2}{6}\)=\(\frac{17}{9}\)

/HT\

Nhập các bạn toàn bắt tớ làm à ngu gò mà làm

a)

\(\frac{20}{11}.\frac{33}{23}.\frac{69}{180}\)

\(=\left(\frac{20}{11}.\frac{69}{180}\right).\frac{33}{23}\)

\(=\frac{23}{33}.\frac{33}{23}=1\)

b)  0,8 x 96 + 0,8 x 2 x 2

=0,8 x ( 96+2+2)

=0,8 x 100

= 80

a) 20/11 x 33/23 x 69/180 = 60/23 x 69/180 = 1

b) 0,8 x 96 + 0,8 x 2 x 2 = 0,8 x ( 96 + 2 ) x 2 = 0,8 x 98 x 2 = 78,4 x 2 = 156,8

a)=\(\frac{20}{11}\).\(\frac{33}{23}\).\(\frac{23}{60}\)

=\(\frac{20}{11}\).(\(\frac{33}{23}\).\(\frac{23}{60}\))

=\(\frac{20}{11}\).\(\frac{759}{1380}\)

=\(\frac{20}{11}\).\(\frac{11}{20}\)

=1

b)=0,8.96+0,8.4

=0,8.(96+4)

=0,8.100

80

* 100 là cái gì vậy .nhân à

79600 nha

=79600

1).( 27,56 x 35 ) + ( 27,56 x 67 ) - ( 27,56 x 2)

= (964 + 1846,52) - 55,12

=2810,52 - 55,12

= 2755,4

2).( 4x 35 ) x ( 25 x 5 ) x 2

= ( 140 x 125 ) x2

= 17500 x 2

=35000

4). 3/10

5). 1188

6).  61/6

1)2756   2)35000   3)0   4)3/10   5)10/1/6

1,2755,4

2,35000

3,0

4,\(\frac{3}{10}\)

5,1188

6,\(\frac{61}{6}\)

b) = ( 675,98 x 0,01 ) + ( 888,66 + 111,34 ) x 0,01

   = 6,7598 + 10

   = 16,7598

phần a đâu