Toán Lớp 7: 1 13/25×1/7-3 13/25×4/7 ạ nhanh nhanh ạ
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Toán Lớp 7: 1 13/25×1/7-3 13/25×4/7 ạ nhanh nhanh ạ
pải thật nhanh ík
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#Xí Muội#
1 13/25 xx 1 / 7 – 3 13 / 25 xx 4 / 7
= 38 / 25 xx 1/ 7 – 88/ 25 xx 4 / 7
=( 38 / 25 xx 1/ 7 )- ( 88/ 25 xx 4 / 7 )
= 38 / 175 – 352 / 175
= – 114 / 175
1 13/25xx1/7-3 13/25xx4/7
=38/25xx1/7-88/25xx4/7
=38/175-152/175
=(-114)/(175)