Odpowiedź :
Odpowiedź:
1.
A) 3 1/2 = 7/2 = 35/10 = 3 5/10 = 3,5
B) 5 2/5 = 27/5 = 54/10 = 5 4/10 = 5,4
C) 8 8/20 = 168/20 = 84/10 = 8 4/10 = 8,4 lub 8 8/20 = 168/20 = 840/100 = 8,04
D) 5 3/25 = 128/25 = 512/100 = 5 12/100 = 5,12
2.
0,4 × 5 = 4/10 × 5/1 = 20/10 = 2
Odp. :5 bochenków chleba waży 2 kg.
1.
[tex]A) \ 3\frac{1}{2} = 3\frac{1\cdot5}{2\cdot5} = 3\frac{5}{10} = 3,5\\\\B) \ 5\frac{2}{5} = 5\frac{2\cdot2}{5\cdot2} = 5\frac{4}{10} = 5,4\\\\C) \ 8\frac{8}{20} = 8\frac{8:2}{20:2} =8 \frac{4}{10} =8,4\\\\D) \ 5\frac{3}{25} = 5\frac{3\cdot4}{25\cdot4} = 5\frac{12}{100} = 5,12[/tex]
2.
0,4 kg - waga jednego bochenka
5 × 0,4 kg = 5 × 4/10 = 20/10 = 2 kg
Odp. 5 bochenków chleba waży 2 kg.