1) 160:(8*5) = 160:40=4
2)(12+8)*(12-8)=20*4=80
3)11*12+72:6= 132+12=144
<span>4)176:11-3*5=16-15=1
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3,7*(-5,02)=-18,574
18,605/6,1=3,05
-5,2/0,04=-130
7 ^ ( N - 1 ) - 7 ^ ( N + 1 ) = 7 ^ N * ( 7 ^ (-1) - 7 ^ 1 ) = 7 ^ N * ( 1/7 - 7 ) =
= 7 ^ N * ( - 6/7 )
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( 12 * 7 ^ N) /( 7 ^ N * ( - 6/7 ) = 12 / ( - 6/7) = ( - 14 )
(840+840:2) : 3:<span>14 = 30 ящиков</span><span>
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