a.tim phan so co mau la 20 sao cho phan so do lon hon 4/13 va nho hon 5/13
b.tim phan so co mau bang 20 sao ho phanso do lon hon 5/7 va nho hon 5/6
Bai 1:Tim tat ca cac phan so bang phan so 34/51 co mau so tu nhien nho hon 13.
Bai 2:Tim va lap cac cap phan so bang nhau ma tu va mau dung 4 trong 5 so:2;4;8;16;32.
Viet phan so \(\frac{2}{3}\) thanh tich cua hai phan so co mau so bang nhau va lon hon 4 va nho hon 8, co tu so nho hon 8. Ket qua
tim cac phan so lon hon 7/10 va nho hon3/4 ma co mau la 60
tim phan so bang phan so am 21 phan 35 va tong cua tu lon hon mau la 32 don vi
tinh tong cac phan so toi gian khong la so tu nhien co mau 11 lon hon 12 va nho hon 35
giup toi voi
tim tong phan so lon hon -1/3 nho hon -1/4 va co mau bang 48
tim tat ca cac phan so co mau so la 12 lon hon -2/3 va nho hon -1/4.
tinh tong cac phan so toi gian lon hon 3 nhung nho hon 4 co mau so bang 7 ket qua la..............
