Question

1 . [( 3 7/12 - 2 11/18 + 2 1/24) * 1 5/31 -3/52 (3 1/2 + 5/6)] * 1 7/13 .
19/84 : (5 13/42 - 2 13/28 + 5/24 ) + 1 2/27 - 1/3 *4/9 =

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2 . . - 1,8 * 2/3 - 0,8 *(-3/4) do potegi 2 . = ..
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3 . 0,9 *5/9 + (-1/2).=
. -2*(0,5) do potegi 2 + (-2) = ...
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4 . -0,1 *[1,3 +6 *( -0,2)]= ...

Answer 1

1 a)...= [( 5 15/24 - 2 11/18)* 36/31 - 3/52 (3 3/6 + 5/6)] * 20/13= [(5 270/432 - 2 264/432) * 36/31 - 3/52 * 13/3] * 20/13 = [ 1302/432 * 36/31 - 1/4] * 20/13 = [ 21/6 - 1/4] * 20/13 = [ 42/12 - 3/12] * 20/13 = 39/12 * 20/13 = 60/12 = 5

 

b)...= 19/84 : (4 1540/1176 - 2 546/1176 + 5/24) + 29/27 - 4/27 = 19/84 : (2 994/1176 + 245/1176)) + 25/27 = 19/84 * 1176/3591 + 25/27 = 14/189 + 25/27 = 14/189 + 175/189 = 1

 

2. ...= - 18/10 * 2/3 - 8/10 * 9/16 = 6/5 - 9/10 = 12/10- 9/10 = 3/10

 

3 a) ...= 9/10 * 5/9 - 1/2 = 1/2 - 1/2 = 0

 

b)...= -2  25/100 - 2 = - 1/2 - 2 = - 2 1/2

 

4. ...= - 1/10 * [ 1,3 - 1,2 ] = - 1/10 * 1/10 = - 1/100