Question

√49-√4 =
20-√16=
√81-√1=
5×√36=

Answer 1

7-2=5
20-4=16
9-1=8
5×6=30

Answer 2

√49=7 e √4=2, logo 7-2=5.
√16=4, logo 20-4=16.
√81=9 e √1=1, logo 9-1=8.
√36=6, logo 5x6=30