Question

làm bằng cách thuận tiện nhất:

134+357+623+726             1/2*5/6-1/2*1/3

=

=              

Answer 1

`134 + 357 + 623 + 726`

`= ( 134 + 726 ) + ( 357 + 623 )`

`= 860 + 980`

`= 1840`

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`1 / 2 xx 5 / 6 - 1 / 2 xx 1 / 3`

`= 1 / 2 xx ( 5 / 6 - 1 / 3 )`

`= 1 / 2 xx ( 5 / 6 - 2 / 6 )`

`= 1 / 2 xx 3 / 6`

`= 1 / 2 xx 1 / 2`

`= 1 / 4`

Answer 2

134+357+623+726

= ( 134 + 726) + ( 357+623)

= 860 + 980

= 1840

 

\(\dfrac{1}{2}x\left(\dfrac{5}{6}-\dfrac{1}{3}\right)=\dfrac{1}{2}x\dfrac{1}{2}=\dfrac{1}{4}\)

 

Answer 3

a)

= ( 134 + 726 ) + ( 357 + 623 )

= 860 + 980

= 1840 

b)

= 1/2 x ( 5/6 - 1/3 )

= 1/2 x 3/6

= 3/12 = 1/4

Answer 4

A) là 1840 còn B) là 1/4 nha !