Решите пожалуйста -5,13:(3 1/4+2/3*(-5)-2 18/25 по действиям прошуу)). Created by polinalolkek1. matematika-ru

25 по действиям прошуу))...

zhenyaM2002

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- 5,13 : ( 3 1/4 + 2/3 * (-5) ) - 2 18/25 =58,84
1) 2/3 * (-5) = - 10/3 = - 3 1/3
2) 3 1/4 + (-3 1/3) = 3 3/12 - 3 4/12 = - 1/12
3) - 5,13 : (-1/12) = - 513/100 * (-12/1) = 6156/100= 61,56
4) 61,56 - 2 18/25 = 61,56 - 2,72 = 58,84

или
- 5,13 : (3 1/4 + 2/3 * (-5) - 2 18/25 )= 1 698/841
1) и 2) не изменяются
3) -1/12 - 2 18/25 = - 25/300 - 2 216/300 = - 2 241/300
4) - 5,13 : (-2 241/300) = (513* 300)/(100*841) = (513*3)/(1*841) =
= 1539/841 = 1 698/841

0 votes Thanks 0

vmaluga2011 -5,13:(3 1/4+2/3*(-5))-2 18/25=58,84
1) 2/3*(-5)=-10/3=-3 1/3
2) 3 1/4+(-3 1/3)=3 3/12-3 4/12=-1/12
3) -5,13:(-1/12)=513/100*12=1539/25=61 14/25
4) 61 14/25-2 18/25=60 39/25-2 18/25=58 21/25=58,84

1 votes Thanks 2

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