Question

Tính Nhanh

a, 117 x ( 36 + 62 ) - 17 x ( 62 + 36 )

b, ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )

c, 506 x 5 + 1012 + 253 x 6

Answer 1

a) = 117 x 100 - 17 x 100

= ( 117 - 17 ) x 100

= 100 x 100

= 10000

 

b) ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )

=  532 x 7 - 266 x ( 2 x 7 ) x 3990

= 532 x 7 - 266 x 2 x 7 x 3990

= (532 x 7 - 532 x 7) x 3990

= 0 x 3990

= 0

 

c) 506 x 5 + 1012 + 253 x 6

= 506 x 5 + (506 x 2) + 253 x ( 2 x 3 )

= 506 x 5 + 506 x 2 + 253 x 2 x 3

= 506 x 5 + 506 x 2 + 506 x 3

= 506 x ( 5 + 2 + 3 )

= 506 x 10

= 5060

Answer 2

đúng rồi cho thôi

Answer 3

a ) 117 x ( 36 + 62 ) - 17 x ( 62 + 36 )

   = ( 117 - 17 ) x 98

   = 100 x 98

   = 9800

Answer 4

Tran minh quan tra loi sai roi

Answer 5

b) ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )

= [7×(532-266×2)]×(532×7+266)

=7×(532-532)×(532×7+266)

=7×0×(532×7+266)

=0

a) 117 x ( 36+ 62 ) - 17 x ( 62 + 36 )

=(36+62)×(117-17)

=98×100

=9800 

Answer 6

(532.7-266.14).(532.7+266)