Toán Lớp 7: 5/9:[1/11-5/22]+5/9:[1/15-2/3]
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Toán Lớp 7: 5/9:[1/11-5/22]+5/9:[1/15-2/3]
Comments ( 2 )
=5/9: (2/22-5/22)+5/9: ( 1/15 -10/15)
=5/9: (-3/22)+ 5/9: (-9/15)
=5/9. (-22/3)+5/9.(-15/9)
=5/9(-22/3-15/9)
=5/9(-66/9-15/9)
=5/9(-81/9)
=5/9.(-9)
=-5