72+36*2+24*3+18*4+12*6+168
=72+72+72+72+72+168
=72*5+168
=360+168
=528
72+72+72+72+72+168=72*5+168=360+168=528
72 + 36 * 2 + 24 * 3 + 18 * 4 + 12 + 6 + 168
72 + 36 x2 + 24 x 3 + 18 x 4 + 12 x 6 + 168
72 + 36 x2 + 24 x 3 + 18 x 4 + 12 x 6 + 168
72 + 36 x 2 + 24 x 3 + 18 x 4 + 12 x 6 + 168 / 2 + 2 + 4 + 6 + 10 + ...+ 68
Tinh nhanh:
\(\frac{\text{72+36*2+24*3+18*4+12*6+168}}{\text{2+2+4+6+10+16+26+42+68}}\)
72+38*2+24*3+18*4+12*6+168
\(\frac{72+36\times2+24\times3+18\times4+12\times6+168}{2+2+4+6+...+512+1024}\)
Các bạn giúp mình và ghi đầy đủ cách giải nhé !
A. (1-1/2)×(1-1/3)×(1-1/4)×(1-1/5)×... (1-1/19)×(1-1/20)
B.(100+67)×67+(200-33)×33
C.72+36×2+24×3+18×4+12×6+168
D.(8,27+7,16+9,33)-(7,27+6,16+8,33)
E.1,5+2,5+3,5+4,5+...+8,5
