Question

necesito ayuda plisssssss​

Answer 1

Usa photo math. Es una aplicación gratuita que explica todos los cálculos matemáticos paso x paso hasta llegar al resultado final.

Corona plis (te estoy dando la solución a todos tus ecuaciones).

Answer 2

Respuesta:

a) 31/21

b) 8/3

c) 43/10

d) 16/7

e) - 19/30

f) 269/175

Explicación paso a paso:

Datos:

a) 1/3 + 1 1/7

= 1/3 + [(1×7)+1]/7 = 1/3 + (7+1)/7 = 1/3 + 8/7

= [(21÷3)(1)+(21÷7)(8)]/21 = [(7)(1)+(3)(8)]/21

= (7+24)/21 = 31/21

= 31/21

b) 2/3 - 1/5 + 2 1/5

= 2/3 - 1/5 + [(2×5)+1]/5

= 2/3 - 1/5 + (10+1)/5 = 2/3 -1/5 + 11/5

= 2/3 +10/5 = [(15÷3)(2)+(15÷5)(10)]/15

= [(5)(2)+(3)(10)]/15 = [10+30] /15 = 40/15 = 8/3

= 8/3

c) 4/5 + 3 1/2

= 4/5 + [(3×2)+1]/2 = 4/5 + (6+1)/2= 4/5 + 7/2

=[(10÷5)(4)+(10÷2)(7)] /10 = [(2)(4)+(5)(7)]/10

= (8+35)/10 = 43/10 = 4.3

=43/10

d) 2/7 + 1 3/4 + 1/4

=2/7 + [(1×4)+3]/4 + 1/4

= 2/7 + (4+3)/4 + 1/4 = 2/7 + 7/4 +1/4

= 2/7 + 8/4 = 2/7 + 2

= [(7÷7)(2)+(7÷1)(2)] /7 = [(1)(2)+(7)(2)]/7

=(2+14)/7 = 16/7

= 16/7

e) 2/3 - 2 1/2 + 1 1/5

= 2/3 - [(2×2)+1]/2 + [(1×5)+1]/5

= 2/3 - (4+1)/2 + (5+1)/5 = 2/3 - 5/2 + 6/5

= [(30÷3)(2)-(30÷2)(5)+(30÷5)(6)] / 30

= [(10)(2)-(15)(5)+(6)(6)] / 30

= [20-75+36] / 30 = (56-75)/30 = - 19/30

= -19/30

f) 9/5 + 2 3/7 - 1 2/3

= 9/5 + [(2×7)+3]/7 - [(1×3)+2]/3

= 9/5 + (14+3)/7 - (3+2)/3 = 9/5 + 17/7 - 5/3

= [(105÷5)(9)+(105÷7)(17)-(105÷3)(5)] / 105

= [(21)(9)+(15)(17)-(35)(5)] / 105

= [189+255-175] / 105 = (444-175)/105

= 269/175