Question

6. Scoate factorul comun, apoi calculeaza:
a) 2×35+2×43=
b) 23+3×23=
c) 3×29-3×25=
d) 2×9+2×1-2×5=
e) 5×a+5×b= ,dacă a+b=0
Vă rog ajutați-mă!! ​

Answer 1

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a) 2 × 35 + 2 × 43 =

= 2 × ( 35 + 43 ) =

= 156

b) 23 + 3 × 23 =

= 3 × ( 23 + 23 ) =

= 138

c) 3 × 29 - 3 × 25 =

= 3 × ( 29 - 25 ) =

= 12

d) 2 × 9 + 2 × 1 - 2 × 5 =

= 2 × ( 9 + 1 - 5 ) =

= 10

e) 5 × a + 5 × b =

= 5 × ( 0 + 0 ) =

= 0

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