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a fost răspuns

1 . Calculati :
a ) 4/5-3/4 =
b ) - 3 , 4+2,86 =
c ) 2/5-1/2-7/10 =
d )1/21- (un întteg) 4/7 + 2/3
e) 5/4-4/3-0,5

Răspuns :

Renatemambouko
a ) 4/5-3/4 =(16-15)/20=1/20
b ) - 3,4+2,86 =-0,54
c ) 2/5-1/2-7/10 =(4-5-7)/10=-8/10=-4/5
d )1/21- 1 4/7 + 2/3 =1/21-11/7+2/3=(1-33+14)/21=-18/21
e) 5/4-4/3-0,5 =5/4-4/3-1/2=(15-16-6)/12=-7/12

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