Question

Napisz działania i wyniki:
(2,125+5/8)*0,8=
5 1/4-(0,77+1,33)=
3,5* 1/7+1,8*2/9=
10,6 : (2 1/4+2,75)=
1,09+7,2 : 1 1/5 =
0,5*0,5+1/5*1 1/5=
(3,8 -2,9)*(3/8+0,125)=
(8 1/3-8,1)*(9-4 5/7=

/ -kreska ułamkowa *- znak mnożenia

Answer 1

(2,125+5/8)*0,8=(2,125+0,625)*0,8=2,75*0,8=2,2
5 1/4-(0,77+1,33)=21/4-(0,77+1,33)=5,25-(0,77+1,33)=5,25-2,1=3,15
3,5* 1/7+1,8*2/9=0,5+1,8*2/9=0,5+0,4=0,9
10,6 : (2 1/4+2,75)=10,6:(9/4+2,75)=10,6:(2,25+2,75)=10,6:5=2,12
1,09+7,2 : 1 1/5 =1,09+7,2:1,2=1,09+6=7,09
0,5*0,5+1/5*1 1/5=0,25+0,2*1/2=0,25+0,24=0,49
(3,8 -2,9)*(3/8+0,125)=0,9*(0,375+0,125)=0,9*0,5=0,45
(8 1/3-8,1)*(9-4 5/7=(25/3-8,1)*(9-4 5/7)=7/30*(9-33/7)=7/30*30/7=1