Question

ajutatima va rog !!!!!​

Answer 1

1) 295/13 - 217/13 = 78/13

2) 836/15 - 129/15 + 3/15 - 485/15 = 707/15 + 3/15 - 485/15 = 710/15 - 485/15 = 225

3) 1 ⅔ - 1/6 + 1 ¾ =

prima oara indroducem integii :

1 ⅔ = 5/3

1 ¾ =7/4

5/3 - 1/6 + 3/8 + 7/4 =

amplificam:

⁴5/3 - ²1/6 + 3/8 + ²7/4 =

20/12 - 2/12 + 3/8 + 14/8 =

⁸18/12 + ¹²17/8 =

144/96 + 204/96 = 348/96

4) 4/5 × ( 2/3 × 9/8 + 1/12 ) =

*efectuam paranteza *

4/5 × ( ⁸2/3 × ³9/8 + ²1/12 ) =

4/5 × ( 16/24 × 27/24 + 2/24 )

4/5 × (274/576 + 2/24) =

4/5 × 276/576=

*amplificam

²⁴4/5 × ⁵276/576 =

96/120 × 1830/120

Coroana ? Sper ca te-am ajutat !