Question

2,4/155

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Answer 1

Răspuns:

Explicație pas cu pas:

2.

a) 1/8+(1/8)·4=(1+4)/8=5/8

b) 1/6+1/6:1/3=1/6+1/6·(3/1)=1/6+3/6=4/6=2/3

c) 4/9+3/10:6/10=4/9+(3/10)·(10/6)=4/9+3/6=4/9+1/2=(8+9)/18=17/18

d) 1 1/3·2 1/2+6=(4/3)·(5/2)+6=20/6+6=(20+36)/6=56/6=28/3        

e) 2 1/7·1 1/5-1/21:1/3=(15/7)·(6/5)-(1/21)·(3/1)=(15·6)/(7·5)-3/21=(3·6)/7-1/7=

(18-1)/7=17/7

f) 5/6:(1/3+1/2:1/3))=5/6:[1/3+(1/2)·(3/1)]=5/6:(1/3+3/2)=5/6:[(2+9)/6]=5/6:11/6= (5/6)·(6/11)=5/11

4.

a) 4,71·10=3,7=47,1-3,7=43,4

b) 29,56-5+14,8·7,2=24,56+106,56=131,12

c) 81,4-3,1·10,8=81,4-33,48=47,92

d) 7,8:2+9,6·3,2=3,9+30,72=34,62

e) 14,49:7-0,026·13=2,07-0,338=1,732

f) 41,41:41+2·2·2=1,01+8=9,01