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2/3 + 5/6 =
8/1 - 1/2 =
3/2 + 4/5 + 7/8 =
7/8 - 5/6 =
avec explication detailler


Répondre :

2/3 + 5/6 = ( 2 * 2 + 5 ) / 6  = ( 4 + 5 ) 6 = 9 /6 = 3 /2

8/1 - 1/2  = 16/2 - 1 /2 = 15/2 = 7.5

3/2 + 4/5 + 7/8

= 60/40 + 32/40 + 35/40

=  127/40

7/8 - 5/6

=  21/24 - 20/24

=  1/24

Bonjour;

2/3 + 5/6 =

2/3 *2/2 +5/6

=4/ 6+ 5/6

= 9/6 = 3/2

8/1 - 1/2 =

8/1 *2/2 -1/2

= 16/2 -1/2

= 17/2

3/2 + 4/5 + 7/8 =

3/2 *24/24 +4/5 * 8/8  +7/8 *5/5

= 72/40 +32/40+35/40

= 139/40

7/8 - 5/6 =

7/8 *3/3 -5/6 * 4/4

= 21/24 -20/24

= 1/24