Odpowiedź :
1.
[tex]7 \times \frac{5}{14} = 1 \times \frac{5}{2} = \frac{5}{2} = 2 \frac{1}{2} [/tex]
B
[tex] \frac{7}{24} \times 8 = \frac{7}{3} \times 1 = \frac{7}{3} =2 \frac{1}{3} [/tex]
C
2.
[tex]6 \times \frac{4}{5} = \frac{24}{5} = 4 \frac{4}{5} [/tex]
A = 4 i 4/5
B = 4 i 4/5
C = 4 i 4/5
D = 5 i 3/5
Odp: D
3.
[tex]3 \frac{3}{14} \times 7 = \frac{45}{14} \times 7 = \frac{45}{2} \times 1 = \frac{45}{2} = 22.5[/tex]
A = 22,5
B = 22,5
C = 22,5
D = 21 i 3/14
Odp: A, B, C
Odpowiedź:
zad 1
7 * 5/14 = 5/2 = 2 i 1/2 B
7/24 * 8 = 7/3 = 2 i 1/3 C
zad 2
6 * 4/5 = 24/5 = 4 i 4/5
4 * 1 i 1/5 = 4 * 6/5 = 24/5 = 4 i 4/5
2 * 2 i 2/5 = 2 * 12/5 = 24/5 = 4 i 4/5
16 * 3/10 = 48/10 = 4 i 8/10 = 4 i 4/5
14 * 4/10 = 56/10 = 5 i 6/10 = 5 i 2/5 -----to wyrażenie ma inną wartość
zad 3
3 i 3/14 * 7 = 45/14 * 7 = 45/2 = 22 i 1/2
3 * 7 i 3/14 = 3 * 101/14 = 7 i 3/14
9 * 2 i 1/2 = 9 * 5/2 = 45/2 = 22 i 1/2 ------to ma równą wartość
5 * 4 i 1/2 = 5 * 9/2 = 47/2 = 23 i 1/2
9 * 2 i 5/14 = 9 * 33/14 = 297/14 = 21 i 3/14