Question

ex 9 10 11 12 /111
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Answer 1

Răspuns:

9.a) 2x 40= 5x 16 ( 80=80)

b)7x20=4x35( 140=140)

c) 5x72= 8x45(360= 360)

d) 9x56= 8x63(504=504)

10. a) $\frac{2}{3} =\frac{4}{6}$      b) $\frac{2}{4} =\frac{8}{16}$

c)$\frac{2}{3} =\frac{6}{9}$    d)$\frac{2}{5} =\frac{4}{10}$

11.a) x= 4*9:3= 36:3= 12   x=12

b) x=8*7:2= 4*7=28

c) x= 3*8:4=24:4= 6

d) x=4*9:3=4*3=12

12. a) $\frac{6}{7} =\frac{42}{49}$      b) $\frac{30}{35}$  

c) $\frac{54}{63}$       d)$\frac{48}{56}$