5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
-> 5/2+4/11+3/22+1/30+13/60
-> 1650/660+240/660+90/660+22/660+143/660
-> 2145/660
-> 13/4
5/2.1+4/1.11+3/11.2+1/12.15+13/15.4
=7.(5/2.7+4/7.11+3/11.14+1/14.15+13/15.28)
=7.(1/2-1/7+1/7-1/11+1/11-1/14+1/14-1/15+1/15-1/28)
=7.(1/2-1/28)=13/14=hỗn số 3 1 phần 4
tính A=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
C=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
Tính nhanh
B=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
tính B= 5/2.1 + 4/1.11 + 3/11.2 + 1/2.15 + 13/15.4
hép miii
Không quy đồng hãy tínhcác tổng sau : 5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
Giải hộ minh với:
B=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
B=5/2.1+4/1.11+3/11.2+2/2.15+1/15.4
Tính:
\(\frac{5}{2.1}+\frac{4}{1.11}+\frac{3}{11.2}+\frac{1}{2.15}+\frac{13}{15.4}\)
\(\frac{5}{2.1}+\frac{4}{1.11}+\frac{3}{11.2}+\frac{1}{2.15}+\frac{13}{15.4}\)