Odpowiedź:
1.
4⅚+3,1=
= 4 i 5/6 + 3 i 1/10 =
= 4 i 25/30 + 3 i 3/30 =
= 7 i 28/30 =
= 7 i 14/15
2.
0,19×5,3=1,007
3.
6,72:1⅙=
= 6 i 72/100 : 7/6 =
= 672/100 * 6/7 =
= 96/50 * 3/1 =
= 288/50 =
= 5 i 38/50 =
= 5 i 19/25
4.
-0,3×(-⅓)²=
= - 3/10 * 1/9 =
= - 1/10 * 1/3=
= - 1/30
5.
-5,6:(-0,8)= 7
6.
3,45+1⅓-1,25=
= 3 i 45/100 + 1 i 1/3 - 1 i 25/100 =
= 3 i 9/20 + 1 i 1/3 - 1 i 5/20 =
= 3 i 27/60 + 1 i 20/60 - 1 i 15/60 =
= 4 i 47/60 - 1 i 15/60 =
= 3 i 32/60 =
= 3 i 8/15
7.
5 ⅔-2,2+1⅖=
= 5 i 2/3 - 2 i 2/10 + 1 i 2/5 =
= 5 i 20/30 - 2 i 6/30 + 1 i 12/30 =
= 3 i 14/30 + 1 i 12/30 =
= 4 i 26/30 =
= 4 i 13/15
8.
-5,8-(-2¾) =
= - 5 i 8/10 + 2 i 3/4 =
= - 5 i 16/20 + 2 i 15/20 =
= - 3 i 1/20
lub na ułamkach dziesiętnych
-5,8-(-2¾) =
= - 5,8 + 2 i 75/100 =
= - 5,8 + 2,75 =
= - 3,05
Szczegółowe wyjaśnienie:
