Question

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Answer 1

Explicación paso a paso:

La primera es:

3 X (6X5)

3 X 30

90

La segunda parte d la primera es:

(6X5) X 3

30 X 3

90

La segunda es:

6 X ( 3 + 4)

( 6 X 3 ) + ( 6 X 4 )

18 + 24

42

8 X ( 5 + 8 )

( 8 X 5 ) + ( 8 X 8 )

40 + 64

104

La tercera es :

9 X ( 8 - 2 )

( 9 X 8 ) - ( 9 X 2 )

72 - 18

54

3 X ( 7 - 5 )

( 3 X 7 ) - ( 3 X 5 )

21 - 15

6