36x5x64x5

{ 6 * 6 } *45

={6*45} *6

=270*6

=1620

\(\frac{36\times45}{6\times5}=\frac{6\times6\times5\times9}{6\times5}=\frac{6\times9}{1}=\frac{54}{1}=54\)

a) = 54

b) = 49

a) \(\frac{36x45}{6x5}\) = \(\frac{6x6x5x9}{6x5}\) = 6 x 9 = 54

a) 36x45/6x5

=6x9/1x1

=54

b) 56x63/9x8

=7x7/1x1

=49

k mk nha mk k lai

Cho mình câu B nữa bạn

a,36*45/6*5=36/6*45/5=6*9=54

b,56*63/9*8=7*7/1*1=49

a) \(\frac{36\cdot45}{6\cdot5}\)

\(=\frac{6\cdot6\cdot5\cdot9}{6\cdot5}\)

\(=6\cdot9\)

\(=54\)

b) \(\frac{56\cdot63}{9\cdot8}\)

\(=\frac{7\cdot8\cdot9\cdot7}{9\cdot8}\)

\(=7\cdot7\)

\(=49\)

a,36*45/6*5                                                                                  b,56*63/9*8

=6*6*5*9/6*5                                                                                   =7*8*7*9/9*8  = 7*7/1 =49

=6*9/1

=54

a, 25 \(\times\)66 + 33 \(\times\) 25 + 25

 = 25 \(\times\) 66 + 33 \(\times\) 25 + 25 \(\times\)1

= 25 \(\times\) ( 66 + 33 + 1)

= 25 \(\times\) ( 66 + 34)

= 25\(\times\) 100

2500

\(\dfrac{2}{3}\) \(\times\) \(\dfrac{9}{7}\) + \(\dfrac{4}{6}\) \(\times\) \(\dfrac{5}{7}\) - \(\dfrac{2}{3}\)

= \(\dfrac{2}{3}\) \(\times\) \(\dfrac{9}{7}\) + \(\dfrac{2}{3}\) \(\times\) \(\dfrac{5}{7}\) - \(\dfrac{2}{3}\) \(\times\) 1

= \(\dfrac{2}{3}\) \(\times\) ( \(\dfrac{9}{7}\) + \(\dfrac{5}{7}\) - 1)

= \(\dfrac{2}{3}\) \(\times\) ( 2 - 1)

= \(\dfrac{2}{3}\) \(\times\) 1

= \(\dfrac{2}{3}\)

25x66+33x25+25

=25x66+33x25+25x1

=25x(66+33+1)

=25x(66+340)

=25x10

=2500

Mọi người giúp mình nha!Mình chỉ tick cho câu trả lời đầu tiên hoi!

159.54+159.46

=159. (54+46) 

=159. 100

=15900

12.5+3.12

=12. (5+3) 

=12.8

=96

2.5+4.5+6.5+8.5

=5. (2+4+6+8) 

=5. 20

=100

Cmt đầu nha bn

159.54+159.46

=159. (54+46) 

=159. 100

=15900

12.5+3.12 =12. (5+3)  =12.8 =96

2.5+4.5+6.5+8.5 =5. (2+4+6+8)  =5. 20 =100

\(\frac{36\times45}{6\times5}\)\(=\)\(\frac{6\times6\times9\times5}{6\times5}\)\(=\)\(54\)

\(\frac{56\times63}{9\times8}\)\(=\)\(\frac{8\times7\times9\times7}{9\times8}\)\(=\)\(49\)

cam on