Question

Ułamki zwykłe i dziesiętne

5 1/4 - 0,77 = ... ?
2 1/4 + 2,75 = ... ?
7,2 : 1 3/5 = ... ?
5/8 x 4,2 = ... ?

Answer 1

5 i 1/4 - 0,77 = 5,25 - 0,77 = 4,48
2 i 1/4 + 2,75 = 2 i 1/4 + 2 i 3/4 = 4 i 4/4 = 5
7,2 : 1 i 3/5 = 7 i 2/10 : 1 i 3/5 = 72/10 : 8/5 = 72/10 * 5/8= 360/80= 4 i 40/80= 4 i 1/2 = 4,5 
5/8 * 4,2 = 5/8 * 4 i 2/10 = 5/8 * 42/10 = 5/8 * 21/5 = 105/40 = 21/8 = 2 i 5/8