Question

Son fracciones heterogéneas
7/12+5/18=
5/4+2/7=
1/4+5/12+7/6=
2/3+7/6+12/9=
3/8-1/4=
9/16-1/2=
4/7-2/9=
5/2-1/3

(Con procedimiento porfavor :(. )
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Answer 1

Respuesta:

7/12+5/18 = 31/36

7/12+5/18 ; 7/12 = (7×6)/(12×6) = 42/72 y 5/18 = (5×4)/(18×4) = 20/72

= 42/72+20/72

= (42+20)/72

= 62/72

= (62÷2/72÷2)

= 31/36

5/4+2/7 = 43/28

5/4+2/7 ; 5/4 = (5×7)/(4×7) = 35/28 y (2×4)/(7×4) = 8/28

= 35/28+8/28

= (35+8)/28

= 43/28

2/3+7/6+12/9 = 19/6

2/3+7/6+12/9 ; 2/3 = (2×6/3×6) = 12/18

= 12/18+7/6+12/9 ; 7/6 = (7×3/6×3) = 21/18

= 12/18+21/18+12/9 ; 12/9 = 24/18

= 12/18+21/18+24/18

= (12+21+24)/18

= 57/18

= (57÷3/18÷3)

= 19/6

3/8-1/4 = 1/8

3/8-1/4 ; 1/4 = (1×2)/(4×2) = 2/8

= 3/8-2/8

= (3-2)/8

= 1/8

9/16-1/2 = 1/16

9/16-1/2 ; 1/2 = (1×8)/(2×8) = 8/16

= 9/16-8/16

= (9-8)/16

= 1/16

4/7-2/9 = 22/63

4/7-2/9 ; 4/7 = (4×9)/(7×9) = 36/63

= 36/63-2/9 ; 2/9 = (2×7)/(9×7) = 14/63

= 36/63-14/63

= (36-14)/63

= 22/63

5/2-1/3 = 13/6

5/2-1/3 ; 5/2 = (5×3/2×3) = 15/6

= 15/6-1/3 ; 1/3 = 2/6

= 15/6-2/6

= (15-2)/6

= 13/6