a) 6 ¼ - 2 ⅝ = 50/ 8 - 21/8 = (50 -21) = 29/8 = 3 5/8
6 ¼ = (25 x 2 ) ---------
-------- = 50/8 8
(4 x 2)
(21 x 1) 21
2 ⅝= --------- =----
( 8 x 1) 8
2⅝= 2 x 8 + 5 =21
----------- ---
8 8
6 ¼= 6 x 4 + 1 = 25/4
------------
4
(4 x 2) 8 (5 x 1) 5
b) ⅘+5/10 = 4/5 = --------= ---- 5/10= ----------- = ----
( 5 x 2 ) 10 (10 x 1) 10
8+5 13
4/5 + 5/10 = 8/10 + 5/10 = ----- = --- = 1 3/10
10 10
c) 3/4 x 2 1/9 = (3 x 21) = 63 7 3
---------- ----- = --- = 1 ----
(4 x 9) 36 4 4
d) 3 3/9 : 1/3 = ( 3 x 9 + 3) 10 1 30 3 30 x 3 90
------------- = --- : --- = ---- x --- = -------- = ---= 10
9 3 3 9 1 9 x 1 9
Mam nadzieję, że pomogłam! Liczę na NAJ!
