Question

calculati: a) 2,4-0,8 b) 19,02-13,08 c) 4- 5,25 d) 2,1(6)- 1,0(6) e) 2,24=1,(3) f) l-3,8(3)l-l-3.(6)

Answer 1

a) 2,4-0,8=1,6
b) 19,02-13,08=5,94
c) 4-5,25= -1,25
d) 2,1(6)-1,0(6)=(21-2)/90-(106-10)/90=19/90-96/90= -77/90
e) 2,24=1,(3)
224/100=12/9
56/25=4/3 Fals
f) |-3,8(3)|-|-3,(6)|=3,8(3)-3,(6)=(383-38)/90-(36-3)/9=345/90-33/9 (amplificãm pe 33/9 cu 10)
345/90-330/90=15/90=5/30=1/6