Question

Các bạn giải giúp mình với:

​(1+2+3+...+100)+(65x111-13x5x37)

Answer 1

+) (1+2+3+......+100) = (1+100)x(100:2)=5050

+) (65x111-13x5x37) = 4810

=> ​(1+2+3+...+100)+(65x111-13x5x37) = 5050-4810= 240

Answer 2

​(1+2+3+...+100)+(65x111-13x5x37)

= [ ( 100 + 1 ) . 100 : 2 ] + ( 65.111 - 65 . 37 )

= ( 10100 : 2 ) + 65 . ( 111 . 37 )

= 5050 + 65 . 74

= 5050 + 4810

= 9860