Question

Zad 22 str 15 matematyka klasa 6
a)4 i 1/4+2 i 1/3*4 i 1/2=
b)5 i 1/7*1 i 5/9-6:4 i 2/3=
c)3 i 1/4*(2 i 1/4-1 i 1/2:6)=
d)5 i 4/9-1 i 1/6:3 i 2/3*(1 i 1/4-1/2

Answer 1

a)4 i 1/4+2 i 1/3*4 i 1/2=  4 ¼  + 7/3 * 9/2 = 4 ¼ +7/1 * 3/2 = 4 ¼ +21/2 = 4 ¼ + 10 ½ = 4 ¼ + 10 2/4 = 14 ¾

 

b)5 i 1/7*1 i 5/9-6:4 i 2/3=  36/7 * 14/9 – 6 /1 * 3/12 = 4/1 * 2/1 – 1/1* 3/2 = 8 – 1 ½ = 6 ½

 

c)3 i 1/4*(2 i 1/4-1 i 1/2:6)= 13/4 * (2 ¼ - 3/2 * 1/6 ) = 13/4 *(9/4 -1/4) = 13/4 *2/1 = 13/2 = 6 ½

 

d)5 i 4/9-1 i 1/6:3 i 2/3*(1 i 1/4-1/2) = 5  4/9 – 7/6*3/11*(5/4 – 2/4) = 5 4/9 – 7/2*1/11*3/4 = 5 4/9 – 21/88 = 4 i 158/176