Question

[phuongthao]

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

[trần minh quân]

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

[Hoàng Pro]

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