Question

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Answer 1

Răspuns:

b). [(1/3+2/21):(1/18+1/14)-2 1/2]×8=

[(7/21+2/21):(7/126+9/126)-5/2]×8=

[9/21:16/126-5/2]×8=

[1/3:8/63]×8=

[1/3×63/8]×8=

9/8×8=

9

c). (1/12+1/24-1/36)÷(1/4+3/5)×2 3/7=

(6/72+3/72+2/72)÷(5/20+12/20)×17/7=

11/72÷17/20×17/7=

11/72×20/17×17/7=

55/126

d).(3+3/8)÷(4/35-2/70×7/4)×4/15=

(24/8+3/8)÷(4/35-1/20)×4/15=

27/8÷(16/140-7/140)×4/15=

27/8÷9/140×4/15=

27/8×140/9×4/15=

14