Toán Lớp 4: Tính :
3/7 + 4/7 – 1/7
9/9 + 7/9 – 14/9
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Toán Lớp 4: Tính :
3/7 + 4/7 – 1/7
9/9 + 7/9 – 14/9
Comments ( 2 )
=7/7 – 1/7 =16/9 – 14/9
=6/7 =2/9