Question

1.Oblicz:

6 4/8 + 5 5/8 - 5 2/8=

2.Oblicz nieznaną liczbę:

x+3 3/4 = 5 2/4

3.Oblicz pamiętając o kolejności wykonywania działań:

2 1/2 + (3 1/2 - 2)=

7 3/4 - (2 1/4+ 2 3/4)=

(5 3/4 + 4 2/4) - (3 1/2 + 2 1/2)=

(6 1/4 - 2 2/4) + (5 2/4 - 3 3/4)=

(4 7/9 - 3 8/9) - 8/9=

4 1/6 + 2 2/6 - 1 5/6=

5 3/4 - (1/4 + 3 3/4)=

6 1/4 + (9 - 3 3/4)=

10 - 5 2/10 + 2 9/10=

/ - to kreska ułamkowa :d

Answer 1

1.

6i4/8 +5i5/8 -5i2/8= 11i9/8 - 5i2/8= 6i7/8 

2.

x +3i3/4 = 5i2/4 

x +15/4 = 22/4  /*4

4x +15 = 22

4x = 22 -15

4x = 7 /:4

x = 7/4

x = 1i3/4

nieznana liczba to 1i3/4

podstawiamy za x 1i3/4

1i3/4 + 3i3/4 = 5i2/4

       4i6/4 = 5i2/4

       5i2/4 = 5i2/4

      

3.

2i1/2 +(3i1/2 -2) = 2i1/2 + 1i1/2 = 3i2/2 = 4

 

7i3/4 -(2i1/4 +2i3/4) = 7i3/4 - (4i4/4)= 7i3/4 - 5 = 2i3/4

 

(5i3/4 +4i2/4) -(3i1/2 +2i1/2) = 9i5/4 -5i2/2 = 10i1/4 -6 = 4i1/4

 

(6i1/4 -2i2/4) +(5i2/4 -3i3/4) = (5i5/4 - 2i2/4) +(4i6/4 -3i3/4)= 3i3/4 +1i3/4= 4i6/4= 5i2/4= 5i1/2

 

(4i7/9 -3i8/9) -8/9= (3i16/9 -3i8/9) -8/9=  8/9 -8/9 =0

 

4i1/6 +2i2/6 -1i5/6= 6i3/6 -1i5/6= 5i9/6 - 1i5/6= 4i4/6= 4i2/3

 

5i3/4 -(1/4 +3i3/4) = 5i3/4 -( 3i4/4)= 5i3/4 - 4 = 1i3/4

 

6i1/4 +(9-3i3/4) = 6i1/4 +(8i4/4 -3i3/4) = 6i1/4 +5i1/4= 11i2/4= 11i1/2

 

10 -5i2/10 +2i9/10 = 12i9/10 -5i2/10 = 7i7/10

 

Answer 2

1. 52/8 + 45/8 - 42/8 = 93/8 = 11 5/8

 

2. x+15/4 = 22/4

22/4 - 15/4 = 7/4 = 1 3/4