Question

3. calculati:
a. 1/3+3/4+(2/3+5/6)=?
b. 7/15-(3/5+4/3+1/15)=?
c. 11/9-[3/4+(-5/36)]=?
d. (-3/14)+[(-1/2)+(+3/7)+(-5/14)=?
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Answer 1

Răspuns:

a. 5/2

b. -23/15

c. 11/18

d. -9/14

Explicație pas cu pas:

1/3+3/4+(2/3+5/6)=1/3+3/4+(4/6+5/6)=1/3+3/4+9/6=8/24+18/24+36/24=60/24=5/2

7/15-(3/5+4/3+1/15)=7/15-(9/15+20/15+1/15)=7/15-30/15= -23/15

11/9-[3/4+(-5/36)]=11/9-(27/36-5/36)=11/9-22/36=44/36-22/36=22/36=11/18

(-3/14)+[(-1/2)+(+3/7)+(-5/14)]=(-3/14)+[(-7/14)+6/14-5/14]= (-3/14)+(-6/14)=-9/14