1. Calculați :
a) (1/4 + 0,3)•40/11
b) (2/27 + 1,(5) )•9/22
c) [ 0,5(4) + 0,2] •45/67
d) 2/13•(1/7 + 1/6)
E) 1 3/5 •(1/16-1/24)
f) (4/5 • 3 1/3 - 2 )•1 2/5 + 1/20
g) ( 11/72 - 1/9 ) • 12 + 6 • 5/18
h) 1/29 •( 9/28 + 1/42) • 21/5
i) 3 1/7 • 5/22 + 4 1/2 • 2 1/3