Question

Bài 1:

D=8+15+22+29+...+351+359

 

Answer 1

Sai de

Answer 2

D=8+15+22+29+...+351+359

=(359- 8) : 7 +1=?(TU TINH KET QUA) (KET QUA CUA SO SO HANG , KHOANG CACH LA 7 NEN CHIA CHO 7)

=(359+8) NHAN VOI SO SO HANG :2 RA KET QUA

Answer 3

\(D=[(359-8)\div7+1]\times\left(359+8\right)\)\(\div2\)=9384.71428571