Question

Tính bằng cách thuận tiện nhất:

a)19/37+(1-19/37)

b)15,27-4,13-1,14

c)60 - 13,75 - 26,25

Nhớ ghi lời giải rõ ràng nha!!!!!

Answer 1

a) 19/37 + (1 - 19/37)

= (19/37  - 19/37) + 1

=  0 + 1 = 1

b) 15,27 - 4,13 - 1,14

= 15,27 - ( 4,13 + 1,14)

= 15,27 - 5,27

= 10

c) 60 - 13,75 - 26,25

= 60 - ( 13,75 + 26,25)

= 60 - 40

= 20

Answer 2

a) 19/37 + ( 1 - 19/37 )

= ( 19/37 - 19/37 ) + 1

= 0 + 1

= 1

b) 15,27 - 4,13 - 1,14

= 15,27 - ( 4,13 + 1,14 )

= 15,27 - 5,27

= 10

c) 60 - 13,75 - 26,25

= 60 - ( 13,75 + 26,25 )

= 60 - 40

= 20

Answer 3

a) \(\frac{19}{37}+\left(1-\frac{19}{39}\right)\)

\(=\left(\frac{19}{37}-\frac{19}{37}\right)+1\)

\(=1\)

b) 15.27 - 4.13 - 1.14

= 15.27 - ( 4.13 + 1.14 )

= 15.27 - 5.27

= 10

c) 60 - 13.75 - 26.25

= 60 - ( 13.75 + 26.25 )

= 60 - 40

= 20