a) 9 × 8 : 3 × 6 : 2 = 72
= 72 : 3 × 6 : 2 =
= 24 × 6 : 2 =
= 144 : 2 =
= 72
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b) 36 - 10 : 2 + 13 = 36 - 5 + 13 = 31 + 13 = 44
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c) 848 - 42 × ( 18 - 2 ) = 848 - 42 × 16 = 848 - 672 = 176
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d) 4 × [ 8 + 4 × ( 9 + 6 × 7 ) ] = 1 184
= 4 × [ 8 + 4 × ( 9 + 63 ) ] =
= 4 × ( 8 + 4 × 72 ) =
= 4 × ( 8 + 288 ) =
= 4 × 296 =
= 1 184
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e) 199 - [ ( 82 - 9 : 9 ) : 9 + 1 ] × 10 - 11 × 9 = 0
= 199 - [ ( 82 - 1 ) : 9 + 1 ] × 10 - 99 =
= 199 - ( 81 : 9 + 1 ) × 10 - 99 =
= 199 - 10 × 10 - 99 =
= 199 - 100 - 99 =
= 99 - 99 =
= 0
