Odpowiedź:
[tex] \frac{30}{100} \times 40 = 0.3 \times 40 = 12 \\ 40 - 12 = 28[/tex]
[tex] \frac{10}{100} \times 30 = 0.1 \times 30 = 3 \\ 30 - 3 = 27[/tex]
[tex] \frac{20}{100} \times 35 = 0.2 \times 35 = 7 \\ 35 - 7 = 28[/tex]
[tex] \frac{20}{100} \times 520 = 0.2 \times 520 = 104 \\ 520 - 104 = 416[/tex]
[tex] \frac{15}{100} \times 480 = 0.15 \times 480 = 72 \\ 480 - 72 = 408[/tex]
[tex] \frac{30}{100} \times 610 = 0.3 \times 610 = 183 \\ 610 - 183 = 427[/tex]
