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Determinati :
A) 1% din 100 D)12%din 375

B) 5% din 20 e)25% din 256
C)10% din 40 f)80%din 405
G)200%din 208 h) 350% din 72

Răspuns :

[tex]a) \frac{1}{100} \times 100 = \frac{1 \times 100}{100} = \frac{100}{100} = 1[/tex]

[tex]b) \frac{5}{100} \times 20 = \frac{1}{20} \times 20 = \frac{1 \times 20}{20} = \frac{20}{20} = 1[/tex]

[tex]c) \frac{10}{100} \times 40 = \frac{1}{1} \times 4 = 1 \times 4 = 4[/tex]

[tex]d) \frac{12}{100} \times 375 = \frac{6}{50} \times 375 = \frac{3}{25} \times 375 = \frac{3}{5} \times 75 = 3 \times 15 = 45[/tex]

[tex]e) \frac{25}{100} \times 256 = \frac{1}{4} \times 256 = \frac{1 \times 256}{4} = \frac{256}{4} = 64[/tex]

[tex]f) \frac{80}{100} \times 405 = \frac{8}{10} \times 405 = \frac{4}{5} \times 405 = 4 \times 81 = 324[/tex]

[tex]g) \frac{200}{100} \times 208 = 2 \times 208 = 416[/tex]

[tex]h) \frac{350}{100} \times 72 = \frac{35}{10} \times 72 = \frac{7} {2} \times 72 = 7 \times 36 = 252[/tex]

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