Question

Resolva as expressões numéricas:

a) 7x5-12+9=

b) 45-(4x7-5x5)=

c) 16+3x7-11=

d)12+[35-(4x8-15)]=

e)7x9+4x6-37=

f)65-7x6+18-5=

Answer 1

a) 7x5-12+9= 35-21=14

b) 45-(4x7-5x5)= 45-(28-25)= 45-3= 42

c) 16+3x7-11= 16+21-11= 37-11= 26

d)12+[35-(4x8-15)]= 12+[35-(32-15)]= 12+[35-17]= 12+18= 30

e)7x9+4x6-37= 63+24-37= 107-37= 70

f)65-7x6+18-5= 65-42+18-5= 23+13= 36

confira antes de responder, fiz os cálculos de cabeça e posso ter errado algo... :))