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calculati a) 4\5+0,25. b 1,4+19\5. c 1,75+3\4.

Răspuns :

4/5+0,25=4/5+25/10=8/5+25/5=43/5=8,06
1,4+19/5=14/10+19/5=14/10+38/10=52/10=5, 2
1,75+3/4=175/10×3/4=
numitorul comun este 20
350/20×15/20=365/20=18,25


a) 4/5+0,25=4/5+25/100=80/100+25/100=105/100=1.05

b) 1,4+19/5=7/5+19/5=26/5=5,2

c) 1,75+3/4=7/4+3/4=10/4=2.5