Explicación paso a paso:
a) (2 + 7) . 7= 7 + 56 = 63
b) 4 . (7 - 4) = 28 - 16 = 12
c) (21 + 15) : 4 = 7 + 2 = 9
d) (11 - 9) . 3 = 11 - 5 = 6
e) (60 - 36) : 6= 7 - 3 = 4
f) 9. ( 8 - 5 ) = 81 - 54 = 27
Espero te ayude
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Explicación paso a paso:
a) (2 + 7) . 7= 7 + 56 = 63
b) 4 . (7 - 4) = 28 - 16 = 12
c) (21 + 15) : 4 = 7 + 2 = 9
d) (11 - 9) . 3 = 11 - 5 = 6
e) (60 - 36) : 6= 7 - 3 = 4
f) 9. ( 8 - 5 ) = 81 - 54 = 27
Espero te ayude