Question

calcule as expressoes, e faça a conta

100- {60-[10-(3-1)] }=
38+ {23-[6-(1+4)+2]-1 }=
63- {40-[30-(15-1+6)+2] }=
(30+4)- {15+[(7+2)-(3+5)] }=

Answer 1

1)  100- {60-[10-(3-1)]}
= 100- {60-[10-(2)]}
= 100 - {60- [10-2]
=100 - {60- [8]}
=100- {60-8}
= 100 - {52}
=100-52
= 48

2)  38 + [23-[6-(1+4)+2]-1]
= 38 + [23-[6-(5)+2]-1]
=38 + [23 - [6-5+2]-1]
= 38+[23- [3]-1]
= 38+ [23-3-1]
=38 + [19]
=38+19
=57

3)  63- {40-[30-(15-1+6)+2] }
= 63- {40-[30-(20)+2]}
= 63- {40- [30-20+2]}
=63-{40-[12]}
=63-{40-12}
=63- {28}
=63-28
=35

4)  (30+4)- {15+[(7+2)-(3+5)] }
= (34) - {15 + [(9)-(8)]}
=34 - {15 + [9-8]}
=34-{15+[1]}
=34- {15+1}
=34- {16}
=34-16
= 18