26 x 17 + 38 x 26 + 26 x 44 + 26

= 26 x 17 + 38 x 26 + 26 x 44 x 1

= 26 x ( 17 + 38 + 44 + 1 )

= 26 x 100

= 2600

Chúc bạn học tốt !!!

26 x 17 + 19 x 52 + 26 x 44 + 26

\(=46\left(17+38+1+44\right)\)

\(=4600\)

  \(\dfrac{26}{7}\) x \(\dfrac{11}{3}-\dfrac{26}{7}\) x \(\dfrac{2}{3}-\dfrac{6}{3}\) x \(\dfrac{26}{7}\)

\(=\dfrac{26}{7}\) x \(\left(\dfrac{11}{3}-\dfrac{2}{3}-\dfrac{6}{3}\right)\)

\(=\dfrac{26}{7}\) x \(\dfrac{3}{3}\)

\(=\dfrac{26}{7}\) x \(1=\dfrac{26}{7}\)

26/7 x 11/3 - 26/7 x 2/3 - 6/3 x 26/7

=( 11/3 - 2/3 - 6/3 ) x26/7

=      1 x 26/7

=         26 /7

Tick cho mình nha

267267 x 113−267113−267 x 23−6323−63 x 267267

=267=267 x (113−23−63)(113−23−63)

=267=267 x 3333

=267=267 x 1=267

a: =13/26*9/18*2/3=2/3*1/4=2/12=1/6

b: =44/22*5/15*3/2=2*1/3*3/2=2*1/2=1

12 x 155 - 12 x 54 - 12

=12 x 155 - 12 x 54 - 12x1

=12x(155-54-1)

=12x100

=1200

26 x 101 - 26

=26 x 101 -26 x 1 

=26 x (101-1)

=26 x 100

=2600

2 x 26 x 5

= 26 x (2 x 5)

= 26 x 10 = 260

180360180

\(13\cdot42\cdot33\cdot26\cdot35\)

\(=\left(42\cdot35\right)\cdot\left(13\cdot26\right)\cdot33\)

\(=1470\cdot338\cdot33\)

\(=16396380\)

21/11 x 22/17x68/63

= 7x3x2x11x4x17      /           11x17x7x3x3

=8/3

5/14x7/13x26/25

=5x7x26              /                14x13x25

= 5x7x13x2             /              7x2x13x5x5

=1/5

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