Toán Lớp 6: 1/1×3 +1/2×3 +1/2×5+ 1/3×5+ 1/3×7 +1/4×7 +1/4×9

0 bình luận về “Toán Lớp 6: 1/1×3 +1/2×3 +1/2×5+ 1/3×5+ 1/3×7 +1/4×7 +1/4×9”

1. Chữ hơi xấu :))

   

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2. 1/1×3+1/2×3+1/2×5+1/3×5+1/3×7+1/4×7+1/4×9

   =3+1/2 .(3+5)+1/3 .(5+7)+1/4 .(7+9)

   =3+1/2 .8+1/3 .12+1/4 .16

   =3+8/2+12/3+16/4

   =3+4+4+4

   =15

   $@ThanhTruc2008$

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