Bonjour, c'est pour calculer ces fractions : 1 :
- x = 3/5 | y = 8/20 : x+y = ? - x-y = ?
- x = 19/17 `| y = 25/51 : x+y = ? - x-y = ?
- x = 1/25 | y = 3/150 : x+y = ? - x-y = ?
- x = 5/19 | y = 6/95 : x+y = ? - x-y = ?
Merci d'avance
- x = 3/5 | y = 8/20 : x+y = ? - x-y = ?
- x = 19/17 `| y = 25/51 : x+y = ? - x-y = ?
- x = 1/25 | y = 3/150 : x+y = ? - x-y = ?
- x = 5/19 | y = 6/95 : x+y = ? - x-y = ?
Merci d'avance
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Verified answer
Bonsoirx = 3/5 | y = 8/20 :
x+y = 3/5+8/20
= (3*4)/(5*4)+8/20
= 12/20+8/20
= (12+8)/20
= 20/20 = 1
x-y = 3/5-8/20
= 12/20-8/20
= (12-8)/20
= 4/20
= 2/10
= 1/5
-x = 19/17 `| y = 25/51 :
x+y = 19/17+25/51
= (19*3)8/(17*3)+25/51
= 57/51+25/51
= (57+25)/51
= 82/51
x-y = 19/17-25/51
= 57/51-25/51
= (57-25)/51
= 32/51
x = 1/25 | y = 3/150 :
x+y = 1/25+3/150
= (1*6)/(25*6)+3/150
= 6/150+3/150
= (6+3)/150
= 9/150
= 3/50
x-y = 1/25-3/150
= 6/150-3/150
= (6-3)/150
= 3/150
= 1/50
x = 5/19 | y = 6/95 :
x+y = 5/19+6/95
= (5*5)/(19*5)+6/95
= 25/95+6/95
= (25+6)/95
= 31/95
x-y = 5/19-6/95
= 25/95-6/95
= (25-6)/95
= 19/95
voià ^^