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( 39 + 27 ) : [-8x(-18+15)]
= 66 : [-8x(-3)]
= 66 : 24
= 2,75
Nomor 10
-7 x [ 29 + ( 14 - 17 ) x (-18) ]
= -7 x [ 29 - 3 x ( - 18 ) ]
= -7 x [ 29 + 54 ]
= -7 x [ 83 ]
= -851