Question

multumesc din suflet ​

Answer 1

Răspuns:

Explicație pas cu pas:

1)

7/5+⁵⁾5=(7+25)/5=32/5

2)

1/9+1/9=2/9

B (Falsa)

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3)

⁵⁾5/2+²⁾2/5=(25+4)/10=29/10

4)

⁶⁾7/5+⁵⁾7/6=(42+35)/30= 77/10

5)

16:4=4

3:2=1,5

4+1,5=5,5=55/10 (suma)

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6)

1/2+1/3+1/4+.....+1/10

1/2+2/3+3/4+.....+ 9/10

............................................

le adunam

(1/2+1/2)+(1/3+2/3)+(1/4+3/4)+....+(1/10+9/10)

obsevam ca in fiecare paranteza = 1

1+1+1+1+....+ 1 ( de 9 ori) = 9

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7)

888/777-222/555= (111*8)/(111*7) -(111*2)/(111*5) = ....se taie toti de 111

= ⁵⁾8/7-⁷⁾2/5

=(40-14)/35

= 26/35

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8)

17/20-²⁾2/10

=17/20-4/20

= 13/20