Question

I. Tính hợp lý:

a) (19,31 - 47,52) - (52,84 - 80,69)

b) (123,456 - 456,789) - (543,211 - 876,543)

c) 19,19 - (35,27 - 16,81) -0,73

d) 49,53 + 53,54 - 19,53 + 6,46

e) 63,36 - 49,94 - (0,06 - 1,64)

g) 4,73 + 5,75 + ( 5,27 - 4,75)

Answer 1

a) -0.36

b)-0.001

 

 

Answer 2

g: =4,73+5,75+5,27-4,75

=10+1

=1

e: =63,36-49,94-0,06+1,64

=65-50

=15

d: =(49,53-19,53)+(53,54+6,46)

=30+60=90