1 + 1 : 2 x 1 + 5 x 6 - 4
=1 + 1 : 2 + 30 - 4
= 1 + 0,5 + 30 - 4
= 1,5 + 28
= 29,5
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Các câu hỏi tương tự
1/2x1/3+1/3-1/4+1/4x1/5
1/2x1/3+1/3-1/4+1/4x1/5
1/2+4/5x6/9
1/1x1/2+1/2x1/3+1/3x1/4+1/4x1/5+1/5x1/6
x+1/2x1/3=3/4 tim x
Tính:(1-1/2x1/2)x(1-1/3x1/3)x(1-1/4x1/4)x…x(1-1/2007x1/2007)
Tính:
(1-1/2x1/2)x(1-1/3x1/3)x(1-1/4x1/4)x…x(1-1/2007x1/2007)
(2+3+...........+2004)x X=2016x2013
c1/4x5 +1/5x6 +1/9x10=4/5 -3xX
tinh nhanh (5/12+1/2x1/3):(2x1/3-1x5/12)