1.) (-2)² + 81 ÷ (-3²)
= (-2)² + 81 ÷ ( -3 × -3 )
= (-2)² + 81 ÷ 9
= (-2)² + ( 81 ÷ 9 )
= (-2)² + 9
= ( -2 × -2 ) + 9
= 4 + 9
= 13
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1.) (-2)² + 81 ÷ (-3²)
= (-2)² + 81 ÷ ( -3 × -3 )
= (-2)² + 81 ÷ 9
= (-2)² + ( 81 ÷ 9 )
= (-2)² + 9
= ( -2 × -2 ) + 9
= 4 + 9
= 13