Đề bài
= ( 5/12 + 1/6 ) : ( 2/3 - 1/12 )
= ( 5/12 + 2/12 ) : ( 8/12 - 1/12 )
= 7/12 : 7/12
= 1
K Trắng nha .
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Đề bài
= ( 5/12 + 1/6 ) : ( 2/3 - 1/12 )
= ( 5/12 + 2/12 ) : ( 8/12 - 1/12 )
= 7/12 : 7/12
= 1
K Trắng nha .
tinh nhanh (5/12+1/2x1/3):(2x1/3-1x1/12) giup mình
tinh nhanh (5/12+1/2x1/3):(2x1/3-1x5/12)
1/1x1/2+1/2x1/3+1/3x1/4+1/4x1/5+1/5x1/6
Tính tổng
1/1x1/2x1/3x1/4x...x99/100
Tính tổng
1/1x1/2x1/3x1/4x...x99/100
1/2x1/3+1/3-1/4+1/4x1/5
1/2x1/3+1/3-1/4+1/4x1/5
x+1/2x1/3=3/4 tim x