Madzia796viz
Rozwiązane

Oblicz
a) 3 X 7/8=
b) 8/7 x 3=
c) 2 x 1 i 1/7=
d) 2 i 1/5 x 3=
e) 5 x 10 i 1/2=
f) 10 x 8 i 2/3=
g) 5 x 7/10=
h) 2/7 x 14=
i) 2/18 x 12=
j) 4 x 5 i 5/12=
k) 6 i 2/8 x 6=
l) 3 x 5 i 5/6=​

Odpowiedź :

Odpowiedź:

3 * 7/8 = 21/8 = 2 i 5/8

8/7 * 3 = 24/7 = 3 i 3/7

2 * 1 i 1/7 = 2 * 8/7 = 16/7 = 2 i 2/7

2 i 1/5 * 3 = 11/5 * 3 = 33/5 = 6 i 3/5

5 * 10 i 1/2 = 5 * 21/2 = 105/2 = 52 i 1/2

10 * 8 i 2/3 = 10 * 26/3 = 260/3 = 86 i 2/3

5 * 7/10 = 35/10 = 3 i 5/10 = 3 i 1/2

2/7 * 14 = 28/7 = 4

2/18 * 12 = 24/18 = 1 i 6/18 = 1 i 1/3

4 * 5 i 5/12 = 4 * 65/12 = 260/12 = 21 i 8/12 = 21 i 2/3

6 i 2/8 * 6 = 50/8 * 6 = 300/8 = 37 i 4/8 = 37 i 1/2

3 * 5 i 5/6 = 3 * 35/6 = 105/6 = 17 i 3/6 = 17 i 1/2

Basetlaviz

[tex]a) \ 3\cdot\frac{7}{8} =\frac{21}{8} = 2\frac{5}{8}\\\\b) \ \frac{8}{7}\cdot3 = \frac{24}{7} = 3\frac{3}{7}\\\\c) \ 2\cdot1\frac{1}{7} = 2\cdot\frac{8}{7} = \frac{16}{7} = 2\frac{2}{7}\\\\d) \ 2\frac{1}{5}\cdot3 = \frac{11}{5}\cdot3 = \frac{33}{5} = 6\frac{3}{5}\\\\e) \ 5\cdot10\frac{1}{2} = 5\cdot\frac{21}{2} = \frac{105}{2} = 52\frac{1}{2}\\\\f) \ 10\cdot8\frac{2}{3} = 10\cdot\frac{26}{3} = \frac{260}{3} = 86\frac{2}{3}[/tex]

[tex]g) \ 5\cdot\frac{7}{10} =\frac{7}{2} = 3\frac{1}{2}\\\\h) \ \frac{2}{7}\cdot14 = 2\cdot2 = 4\\\\i) \ \frac{2}{18}\cdot12 = \frac{2}{3}\cdot2 = \frac{4}{3} = 1\frac{1}{3}\\\\j) \ 4\cdot5\frac{5}{12} = 4\cdot\frac{65}{12}=\frac{65}{3} = 21\frac{2}{3}\\\\k) \ 6\frac{2}{8}\cdot6 = 6\frac{1}{4}\cdot6 = \frac{25}{4}\cdot6 = \frac{25}{2}\cdot3 = \frac{75}{2} = 37\frac{1}{2}[/tex]

[tex]l) \ 3\cdot5\frac{5}{6} = 3\cdot\frac{35}{6} = \frac{35}{2} = 17\frac{1}{2}[/tex]

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