Question

Tính bằng cách thuận tiện nhất
a) 48,25+ 17,72+ 51,75+ 87,28
B) 0,087+ 1,123 + 1,913 + 0,877

Answer 1

a,=(48,25+51,75)+(17,72+87,28)

=100+100

=200

b,=(0,087+1,913)+(1,123+0,887)

=2+2

=4

Answer 2

` = (48,25 + 51,75) + (12,72 + 87,28)`
`  = 100 + 100`
`  = 200`

________________________________
 ` = ( 0,087 + 1,913) + ( 1,123 + 0,877)`
 ` = 2 + 2=4`

Answer 3

=(48,25+51,75)+(17,72+87,28)=100+105=205

=(0,087+1,913)+(0,877+1,123)=2+2=4

Answer 4

 

=(48,25+51,75)+(17,72+87,28)

=100+100=200

=(0,087+1,913)+(1,123+0,887)

=2+2=4