Calcule puis simplifier le résultat .
a) 3/7 + 26/21
b) 1/12 + 1/6
c) 21/18 + 2/3
b) 57/45 + 9/15
aidez moi svp ! urgent
a) 3/7 + 26/21
b) 1/12 + 1/6
c) 21/18 + 2/3
b) 57/45 + 9/15
aidez moi svp ! urgent
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Verified answer
Bonsoir ,a)
3/7 + 26/21
= 9/21 + 26/21
= 35/21
= 5/3
b)
1/12 + 1/6
= 1/12 + 2/12
= 3/12
= 1/4
c)
21/18 + 2/3
= 21/18 + 12/18
= 33/18
= 11/6
d)
57/45 + 9/15
= 57/45 + 27/45
= 84/45
= 28/15
3/7+26/21=
3/7=3x3/3x7=9/21
9/21+26/21= 35/21
35/21=5x7/3x7=5/3
3/7+26/21=5/3
1/12+1/6=
1/6=1x2/6x2=2/12
1/12+2/12=3/13/12=3x1/3x4=1/4
1/12+1/6=1/4
21/18+2/3=
21/18=3x7/6x3=7/6
7/6+2/3=
2/3=2x2/3x2=4/6
7/6+4/6=11/6
21/18+2/3=11/6
57/45+9/15=
57/45=19x3/15x3=19/15
19/16+9/15=28/15
57/45+9/15=28/15