Răspuns:
19.
a)8/10 • 1/16 = 1/20 = 0,05
b)253/10 • 1/50 = 253/500 = 0,506
c)1423/100 • 1/25 = 1423/2500 = 0,5692
d)Nu se vede...
e)6,453
f)7/100 • 1/1000 = 7/10000 = 0,0007
g)93712/10 • 1/50 = 93712/500 = 187,424
h)Nu se vede...
i)1818/100 • 100/505 = 1818/505 = 3,6
j)18104/100 • 10/146 = (18104•146)/10 = 264318,4
k)1836/10 • 10/85 = 1836/85 = 21,6
l)Nu se vede...
20.
a)25/10 • 1/3 = 25/30 = 5/6 = 0,8(3)
b)18/10 • 10/27 = 18/27 = 2/3 = 0,(6)
c)107/10 • 10/9 = 107/9 = 11,(8)
d)Nu se vede...
e)23/10 • 100/45 = 230/45 = 5,(1)
f)54/10 • 100/7 = 540/7 = 77,(142857)
g)7/9 • 100/175 = 700/(9•175) = 700/1575 = 0,(4)
h)Nu se vede...
