Question

6 . 9
-- . -- =
11 22

12 . 4
-- . -- =
13 39

2 . 1
-- . -- =
3 6

3 . 21
-- . -- =
4 40

7 . 3
-- . -- =
9 10

Answer 1

$\frac{6}{11} \div \frac{9}{22} = \frac{6}{11} \times \frac{22}{9} = \frac{4}{3}$
$\frac{12}{13} \div \frac{4}{39} = \frac{12}{13} \times \frac{39}{4} = 9$
$\frac{2}{3} \div \frac{1}{6} = \frac{2}{3} \times 6 = 4$
$\frac{3}{4} \div \frac{21}{40} = \frac{3}{4} \times \frac{40}{21} = \frac{10}{7}$
$\frac{7}{9} \div \frac{3}{10} = \frac{7}{9} \times \frac{10}{3} = \frac{70}{27}$

Answer 2

Răspuns

Explicație pas cu pas:

( 6 / 11 ) : ( 9 / 22 ) = ( 6 / 11 ) × ( 22 / 9 ) = ( 6 / 9 ) × ( 22 / 11) =

=  ( 2 / 3 ) × 2 = 4/ 3

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12 / 13   :   4 / 39 = 12 / 13  ×  39 / 4 = ( 12 × 39 ) / ( 13 × 4 ) = 3 × 3 = 9

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(2 / 3 ) : ( 1 / 6 ) = ( 2 / 3 ) × 6 = ( 2 × 6 ) / 3 = 12 / 3 = 4

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( 3 / 4 ) : ( 21 / 40 ) = ( 3 / 4 ) × ( 40 / 21 ) = 120 / 84 = 10 / 7

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( 7 / 9 ) : ( 3 / 10 ) = ( 7 / 9 ) × ( 10 / 3 ) = 70 / 27