A=55/11.16+55/16.21+...+55/36.41
A=11x(1/11−1/16+1/16−1/21+...+1/36−1/41)
A=11x(1/11−1/41)
A=11x30/451
A=30/41
Các câu hỏi tương tự
55/11*16 +55/16*21 +55/21*26 +55/26*31+55/31*36 +55/36*41
tính : A=55/11*16 + 55/16*21 + 55/21*26 + 55/26*31 + 55/31*36 + 55/36*41
Tinh: 55/11*16+55/16*21+55/21*26+55/26*31+55/31*36+55/36*41
Tính:
A=55/11*16+55/16*21+55/21*26+55/26*31+55/31*36+55/36*41
38/25+9/10-11/15+13/21-15/28+17/36-19/45+21/55=
31*55+31*55
A= 1/15 + 1/21 + 1/28 + 1/36 + 1/45 + 1/55
a) 5/9 * 12/25
b) 12/11 : 36/55
c) 9/55 * 22
d) 144/7 : 36
A= 1/3 + 1/6 + 1/10 + 1/15 + 1/21 +1/28 + 1/36 +1/45 + 1/55