Calculati:

a)-3\14+2\21

b)1intreg3\4-2\3

c)4,32-2intreg1\2

d)1intreg1\8+(-1,15)

e)9\20-(1\5+1\4)


Răspuns :

a)35/294
b)13/12
c)91/50
d)-1/40
e)0
a)-3/14+2/21=3/14-2/21=69/294-28/294=35/294
b)1intreg3/4-2/3=7/4-2/3=21/12-8/12=13/12
c)4,32-2intreg1/2=423/100-3/2=864/200-300/200=564/200
d)1intreg1/8+(-1,15)=9/8-115/100=900/800-920/800=20/800
e)9/20-(1/5+1/4)=1/5+1/4=4/20+5/20=9/20-9/20=1/1=1