Toán Lớp 2: rút gọn phân số :
18.3^2 / 81.8^2
.= nhân
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Toán Lớp 2: rút gọn phân số :
18.3^2 / 81.8^2
.= nhân
Comments ( 2 )
18×3²/81×8²=2×9×9/9×9×2×32=1/32
(18.3^2)/(81.8^2)
=(9.2.9)/(9.9.8.4.2)
=1/(8.4)
=1/32