Question

1313/2121 x 165165/143143 x 424242/151515

Answer 1

Trloi chi tiết giúp tớ

Answer 2

=13/21*15/13*14/5

=5/7*14/5

=2

Answer 3

=\(\dfrac{13\cdot101}{21\cdot101}\)*\(\dfrac{165\cdot1001}{143\cdot1001}\)*\(\dfrac{42\cdot10101}{15\cdot10101}\)

=\(\dfrac{13}{21}\)*\(\dfrac{165}{143}\)*\(\dfrac{42}{15}\)

=\(\dfrac{13\cdot15\cdot11\cdot21\cdot2}{21\cdot13\cdot11\cdot15}\)=2

Answer 4

13x101/21x101 x 165x1001/143x1001 x 42x10101/15x10101

=13/21 x 165/143 x 42/15

=13x15x11x21x2/21x13x11x15

=2