Question

tính 7/5 + 4/3 + 7/5 + 4/3 bằng hai cách

Answer 1

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 2

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 3

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 4

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 5

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 6

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 7

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 8

C1:=2x7/5+2x4/3=82/15

C2:=7/5+7/5+4/3+4/3=14/5+8/3=82/15

Answer 9

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 10

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 11

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 12

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 13

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 14

C!:7/5 + 4/3 + 7/5 + 4/3

=31/15+31/15

=62/15

C2:7/5 + 4/3 + 7/5 + 4/3

=7/5+4/3

=62/15

Answer 15

Cách 1:

7/5 + 4/3 + 7/5 + 4/3 = 21/15 + 20/15 + 21/15 + 20/15 = 82/15.

Cách 2: 

( 7/5 + 7/5 ) + ( 4/3 + 4/3 ) = 14/5 + 8/3 = 42/15 + 40/15 = 82/15. ( Tính chất kết hợp ).

Answer 16

7/5 + 4/3 + 7/5 + 4/3

=7/5 x 2 + 4/3 x 2

=14/5 + 8/3

=42/15 + 40/15

=82/15

C2

7/5 + 4/3 + 7/5 + 4/3

= 21/15 + 20/15 + 21/15 + 20/15

=41/15 + 41/15

=82/15