Question

Eliminar signos de agrupación

1] {20-6(10-2)+12-6-3(-3-6)+19}

2] [23-18+7(-1-7)-6(5+7)+10-21]

Answer 1

1) {20-(60-12)+12-6-(-9-18)+19}

{20-(48)+6-(-27)+19}

{20-48+6+27+19}

=24

2) [23-18+(-7-49)-(30+42)-11]

[23-18-7-49-32-42-11]

=-136