Odpowiedź :
Odpowiedź:
a) 42/5+0.15=91/20=4 11/20 = 4,55
b 121/4-6,7=111/20=5 11/20=5,55
c9,25-5 1/2 =15/4=3 3/4 =3,75
11.a 5+(3 3/4-2,25)=13/2 =6 1/2 =6,5
b 6 1/7-(3 3/7-2 1/14)=139/28 =4 27/28 =4,96
c 7 3/8-(1 3/4+3,125)=5/2 =2 1/2 =2,5
Odpowiedź:
4 i 2/5 + 0,15 = 4,4 + 0,15 = 4,55
12 i 1/4 - 6,7 = 49/4 - 6,7 = 12,25 - 6,7 = 5,55
9,25 - 5 i 1/5 = 9,25 - 26/5 = 9,25 - 5,2 = 4,05
5 + (3 i 3/4 - 2,25) = 5 + (15/4 - 2,25) = 5 + (3,75 - 2,25) = 5 + 1,5 = 6,5
6 i 1/7 - (3 i 3/7 - 2 i 11/14) = 6 i 1/7 - (3 i 6/14 - 2 i 1/14) = 6 i 1/7 - 1 i 5/14 = 6 i 2/14 - 1 i 5/14 = 5 i 16/14 - 1 i 5/14 = 4 i 11/14
7 i 3/8 - (1 i 3/4 + 3,125) = 7 i 3/8 - (7/4 + 3,125) = 7 i 3/8 - (1,75 + 3,125) = 7 i 3/8 - 4,875 = 59/8 - 4,875 = 7,375 - 4,875 = 2,5