Question

Zadanie 1.

Oblicz ;

a. 2 5/8 + 1 3/4 - 1 1/2 =

b. 1 1/7 x 1 3/4 =

c. 1 1/3 ; 12 =

d. 2 5/6 ; 3 2/5 x 1 1/5 =

proszę o rozwiązania

zadania MOgą BYĆ NA KARTCE W ZAŁĄCZNIKU.

Zadanie 2

oblicz;

a. 5,75 + 1 3/5 =

b. 3 1/6 - 1,4 =

c. 1,04 x 3 1/8 =

d. 2 1/3 ; 3,2 =

Answer 1

Zadanie 1.

a. 2 5/8 + 1 3/4 - 1 1/2 = 21/8 + 7/4 - 3/2 = 21/8 + 14/8 - 12/8 = 23/8 = 2 7/8

b. 1 1/7 x 1 3/4 = 8/7 · 7/4 = 2/1 = 2

c. 1 1/3 ; 12 = 4/3 ÷ 12/1 = 4/3 · 1/12 = 1/9

d. 2 5/6 ; 3 2/5 x 1 1/5 = 17/6 ÷ 17/5 · 6/5 = 17/6 · 5/17 · 6/5 = 5/6 · 6/5 = 1

 

Zadanie 2

a. 5,75 + 1 3/5 = 5 3/4 + 8/5 = 23/4 + 8/5 = 115/20 + 32/20 = 147/20 = 7 7/20

b. 3 1/6 - 1,4 = 19/6 - 14/10 = 95/30 - 42/30 = 53/30 = 1 23/30

c. 1,04 x 3 1/8 = 104/100 · 25/8 = 13/4 = 3 1/4

d. 2 1/3 ; 3,2 = 7/3 ÷ 32/10 = 7/3 · 10/32 = 70/96 = 35/48

Answer 2

z 1 a) 2 5/8 + 1 3/4 - 1 1/2 = 21/8 + 7/4(*2) - 3/4(*4) = 21/8+ 14/8 - 12/8 = 35/8 - 12/8= 23/8= 2 7/8

b) 1 1/7 * 1 3/4 = 8/7 * 7/4 = 56/28 = 2

c) 1 1/3 : 12 = 4/3 : 12 = 4/3 * 1/12 = 4/36 = 1/9

d) 2 5/6 : 3 2/5 * 1 1/5 = 17/6 : 17/5 * 6/5 = 17/6 * 5/17 * 6/5 = 1 < skróć 17 i 5 >