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oliveira123robe
7

Determine o valor das expressões numéricas: a)(1/3+1/4)+(2-1/2+1/6)? b)(1/5+1/4):(1+1/8)? c)2/3+(3/5-1/2):(1/5+1)?

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marcelaousadinha

a) (1/3+1/4)+(2-1/2+1/6)? (4/12+3/12) + (2/1+1/2+1/6) (7/12) + (12/6-3/6+1/6) (7/12) + (10/6):2 7/12 + 5/3 1/12 + 20/12 21/12:3 7/4 b)(1/5+1/4):(1+1/8)? (4/20+5/20):(1/1+1/8) (9/20):(8/8+1/8) (9/20):(9/8) 9/20 X 8/9 72/180: 2 36/90:2 18/45:3 6/15:3 2/5 c)2/3+(3/5-1/2):(1/5+1)? 2/3 + (6/10-5/10):(5/5+1/5) 2/3 + (1/10):(6/5) 2/3 + (1/10 X 5/6) 2/3 + (5/60:5=1/12) 2/3 + 1/12 4/12+1/12 5/12

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