Question

a)101-(62+12-59)+(100-77+21)= b)12+[15-(60:12-3)+2]= c){28:(18:3-2)+[7+(4-12:4)]}-10=

Answer 1

A)101-(62+12-59)+(100-77+21)=
100 - 15 + 44
85 + 44 
129

B)12+[15-(60:12-3)+2]=
12 + [15-(5 - 3 ) + 2 ]
12 + [15-2+2]
12 + 15
27

C){28:(18:3-2)+[7+(4-12:4)]}-10=
{28:(6 - 2 ) + [7+(4 - 3 )]}-10
{28:4 + [7 + 1 ]}-10
{7 + 8 }-10
15 - 10 
5

Answer 2

a) 101-(62+12-59)+(100-77+21)=
101-15+44=
86+44=
130

b) 12+[15-(60:12-3)+2]=
12+[15-5-3+2]=
12+9=
21

c){28:(18:3-2)+[7+(4-12:4)]}-10=
{28:4+[7+1]}-10=
7+8-10=
15-10=
5

Bons estudos!!!!