Question

calculati urmatoarele probleme din imagine va rog mult si cat de repede se poate​

Answer 1

Răspuns:

a) 0,2+0,5+1/3=0,7+1/3=7/10+1/3=21/30+10/30=31/30=1,0(3)

b)0,2-0,1(6)+0,5=2/10-15/90+5/10=1/5-1/6+1/2=6/30-5/30+15/30=16/30=0,5(3)

c) 0,25-1/7+0,2=25/10-1/7+2/10=1/4-1/7+1/5=35/140-20/140+28/140=43/140=0,30(714285)

d)0,5+1,4·(2/3+1/6)=5/10+14/10·5/6=1/2+7/6=10/6=1,(6)

e) 0,6·(2/3)²:2/5=6/10·4/9·5/2=2/3=0,(6)

f)(2/3+1/6):7/3·0,4=5/6·3/7·4/10=1/7=0,(142857)

g) (1/2)³:(1/2)²+(1/2)²-0,25:2=1/8·4+1/4-25/100·1/2=2/4+1/4-1/4·1/2=3/4-1/8=6/8-1/8=7/8=0,875

h)6/7·0,(6):2³/(2·3+1)=6/7·6/9·7/8=1/2=0,5

Explicație pas cu pas: