Question

Oblicz
8+2×4,2-3,2=
6 1/3-1/3×1 4/5+2=
3 3/4×4/9-4/9+4=
(1/2+1/3)×6-2×0,1=
(12 1/5-4 2/3)÷(1 3/4×8)=

Rozpiszcie to!

Answer 1

8+2×4,2-3,2=8+8,4-3,2=16,4-3,2=13,2

6 1/3-1/3×1 4/5+2=19/3-1/3*9/5+2=19/3-3/5+2=95/15-9/15+30/15=86/15+30/15=
=116/15=7 11/15

3 3/4×4/9-4/9+4=15/4*4/9-4/9+4=5/3-4/9+4=15/9-4/9+36/9=11/9+36/9=47/9=5 2/9

(1/2+1/3)×6-2×0,1=(3/6+2/6)*6*1/10=5/6*6*1/10=5*1/10=5/10=1/2

(12 1/5-4 2/3)÷(1 3/4×8)= 61/5-14/3):(7/4*8)=(183/15-70/15):14=113/15*1/14=113/210

Answer 2

8+2*4,2-3,2= 8+8,4-3,2= 16,4-3,2=13,2
6 1/3- 1/3*1 4/5 +2 = 6 1/3 - 1/3 * 9/5 + 2 =6 1/3 - 9/15 +2 = 19/3 - 9/15 +2 = 95/15 -9/15 + 2 = 86/15 + 2 = 5 11/15 + 2 = 7 11/15
3 3/4 * 4/9 - 4/9 +4 = 15/4 *4/9 -4/9 + 4 = 60/36 - 4/9 + 4= 60/36 - 16/36 +4 = 44/36 + 4 = 4 44/36 = 5 8/36 = 5 2/9
( 1/2 + 1/3 ) * 6 - 2 * 0,1 = (3/6+2/6)*6-0,2= 5/6*6-0,2=30/6-0,2= 5-0,2= 4,8
(12 1/5-4 2/3) / (1 3/4*8) = (12 3/15 -4 10/15) / ( 7/4*8) = (11 18/15 - 4 10/15) /  56/4= 7 8/15   /   56/4  = 113/15 * 4/56 = 452/840 = 113/210