Sagot :
① ( –2 + 11 ) – 5 = 4
↝ ( –2 + 11 ) – 5
↝ 9 – 5
↝ 4
② ( –15 × –3 ) ÷ 5 = 9
↝ ( –15 × –3 ) ÷ 5
↝ 45 ÷ 5
↝ 9
③ 24 ÷ ( 9 – 12 ) = –8
↝ 24 ÷ ( 9 – 12 )
↝ 24 ÷ –3
↝ –8
↝ ( –2 + 11 ) – 5
↝ 9 – 5
↝ 4
↝ ( –15 × –3 ) ÷ 5
↝ 45 ÷ 5
↝ 9
↝ 24 ÷ ( 9 – 12 )
↝ 24 ÷ –3
↝ –8