Question

Caculé as seguintes adições algébricas:
A) 3-{9-[-5+(10-18)+3]-10}=
B) 15-{10+[-8+(10-3)-7]+19=
C) {25-[44+(60-78)-15]-33}=
D) {110-[-75+(19-23)-94]+10}=

Answer 1

Boa tarde.

A) 3-{9-[-5+(10-18)+3]-10} = -6
B) 15-{10+[-8+(10-3)-7]+19} = -6
C) {25-[44+(60-78)-15]-33} = -19
D) {110-[-75+(19-23)-94]+10} = 293

A) 3-{9-[-5+(10-18)+3]-10} =
3-{9-[-5+(-8)+3]-10} = 
3-{9-[-5-8+3]-10} = 
3-{9-[-13+3]-10} = 
3-{9-[-10]-10} = 
3-{9+10-10} = 
3-{19-10} = 
3-{9} = 
3-9 = -6

B) 15-{10+[-8+(10-3)-7]+19} =
15-{10+[-8+7-7]+19} = 
15-{10+[-15+7]+19} = 
15-{10+[-8]+19} = 
15-{10-8+19} = 
15-{29-8} = 
15-{21} = 
15-21 = -6

C) {25-[44+(60-78)-15]-33} =
{25-[44+(-18)-15]-33} = 
{25-[44-18-15]-33} = 
{25-[44-33]-33} = 
{25-[11]-33} = 
{25-11-33} = 
{25-44} = -19

D) {110-[-75+(19-23)-94]+10} =
{110-[-75+(-4)-94]+10} = 
{110-[-75-4-94]+10} = 
{110-[-173]+10} =
{110+173+10} = 293

Regras dos sinais:

+ com + = +
- com - = +
- com + = -
+ com - = -

Bons estudos! :-)