Question

[Nguyen tuan cuong]

1)2*17*9+18*540+29*18

2)5*{26-[3*(5+2*5)+15]/15}

3)(2018*2019+2019*2020)*(45*120-15*360)*(1+5+9+13+17+...+2015+2019)

Answer 1

[Nguyen tuan cuong]

giup minh nhanh nhe

Answer 2

[Cù Minh Duy]

1) 2*17*9+18*540+29*18

= 18*17+18*540+29*18

= 18*(17+540+29)

= 18*586

= 10548

2) 5*{26-[3*(5+2*5)+15]/15}

= 5*{26-[3*(5+10)+15]/15}

= 5*{26-[3*15+15]/15}

= 5*{26-[45+15]/15}

= 5*{26-60/15}

= 5*{26-4}

=5*22

=110

3) (2018*2019+2019*2020)*(45*120-15*360)*(1+5+9+13+17+...+2015+2019)

= (2018*2019+2019*2020)*(15*3*120-15*120*3)*(1+5+9+13+17+...+2015+2019)

= (2018*2019+2019*2020)*0*(1+5+9+13+17+...+2015+2019)

= 0