Question

a) (13-5)+(9-3).(7+6)=
b)(2+7).(4+3)-(5.4-5)
c)(18-15:5+3).4=
d)[(21:7).(9:3)+6]-[(7.6):(5-2)]=
e){[13-(3.2+1)]+3+[(5.2-4:2)]
me ajudem pfvr

Answer 1

A)
= (13-5)+(9-3).(7+6)
= 8 + 6 . 13
= 8 + 78
= 86

b)
= (2+7).(4+3)-(5.4-5)
= 9.7 - (20 - 5)
= 63 - (15)
= 63 - 15
= 48

c)
= (18-15:5+3).4
= (18 - 3 + 3).4
= 18.4
= 72

d)
= [(21:7).(9:3)+6]-[(7.6):(5-2)]
= [ 3 . 3 + 6] - [ 42 : 3 ]
= [ 9 + 6 ] - [ 14 ]
= 15 - 14
= 1

e)
= {[13-(3.2+1)]+3+[(5.2-4:2)]
= {[13 - (6+1)] + 3 + [10 - 2]}
= { [ 13 - 7] + 3 + 8 }
= { 6 + 11 }
= 17