Question

Me ajudem é para amanhã!!
91 e 92

Answer 1

Resposta:

Explicação passo-a-passo:

91)

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

2×6/5×6 + 1×15/2×15 - 1×10/3×10

12/30 + 15/30 - 10/30

12+15-10/30

17/30

b) 3/4 × 5/6 + 1/2

3×5/4×6 + 1/2

15/24 + 1/2

15/24 + 1×12/2×12

15+12/24

17/24

c) 2/3 + 1/4 ×3

2/3 + 1×3/4×1

2/3 + 3/4

2×4/3×4 + 3×3/4×3

8/12 +6/12

8+6/12

14/12

7/6

d) 3/4 : 1/2 - 2/3

3×2/4×1 - 2/3

6/4 - 2/3

3/2 - 2/3

3×3/2×3 - 2×2/3×2

9/6 - 4/6

9-4/6

5/6

e) 3/5 + 1/5 : 1/10

3/5 + 1×10/5×1

3/5 + 10/5

13/5

f) 2 × 1/2 + 3/2 × 1/2

1×2/2×1 + 3×1/2×2

2/2 + 3/4

2×2/2×2 + 3/4

4/4 + 3/4

7/4

92)

8/5 = 1,6

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