Question

a)√81+√729-√121
b)-√256.√9+√625
c)√324:√36.√49
e)√100+√21-√81
h)√400-√36+√4
i)√16.√25:√4
j)-√784:√4-√81

Answer 1

A) 9+27-11=25
B) -16x3+25= -23 
C) 18:6x7= 21
E) ?
H) 20-6+2=16
I) 4x5:2= 10
J) -28:2-9= -23

Answer 2

A)
= √81+√729-√121
= 9 + 27 - 11
=  36 - 11
= 25

b)
= -√256.√9+√625
= - 16.3 + 25
= - 48 + 25
= - 23

c)
= √324:√36.√49
= 18: 6 . 7
= 3.7
= 21

e)
= √100 + √121 - √81
= 10 + 11 - 9
= 10 + 2
= 12

h)
= √400-√36+√4
= 20 - 6 + 2
= 14 + 2
= 16

i)
= √16.√25:√4
= 4.5 : 2
= 20: 2
= 10

j)
= - √784 :√4 - √81
= - 28: 2 - 9
= - 14 - 9
= - 23