kết quả là 3/4 mới đúng
đảm bảo đấy.
kết quả là 3/4 mới đúng
đảm bảo đấy.
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?
Tính:
a)\(\frac{38}{42}+\frac{84}{42}=\) b)\(\frac{12}{36}+\frac{56}{12}=\)
c)\(\frac{81}{24}+\frac{98}{42}=\) d)\(\frac{87}{99}+\frac{98}{99}=\)
\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+....+\frac{1}{2048}\)
Tính tổng dãy số vô hạn sau:
a)\(\frac{1}{3-2+6}+\frac{2}{3-2+6}+\frac{3}{3-2+6}+...\)
b)\(\frac{2}{4\times8}+\frac{4}{4\times8}+\frac{6}{4\times8}+...\)
c)\(1+2-3+4-5+...\)
d)\(\left(-10\right)+\left(-11\right)+\left(-12\right)+...\)
Chuyển hỗn số sau thành phân số: \(3\frac{1}{1}\)=
A\(\frac{2}{2}\)
B\(\frac{3}{12}\)
C\(\frac{4}{1}\)
D\(\frac{3\sqrt[]{}}{3}\)
\(\frac{2}{3}+\frac{9}{6}\)
\(\frac{4}{5}+\frac{25}{15}\)
\(\frac{20}{10}+\frac{8}{2}\)
1.Tính:
8 :8= 16:8= 24:8=
32:8= 40:8= 48:8=
56:8= 64:8= 72:8=
80:8=
2.Số?
\(...\times\frac{1}{8}=1\) \(...\times\frac{1}{8}=2\)\(...\times\frac{1}{8}=3\)\(...\times\frac{1}{8}=4\)
\(...\times\frac{1}{8}=5\) \(...\times\frac{1}{8}=6\)\(...\times\frac{1}{8}=7\)
\(...\times\frac{1}{8}=8\)\(...\times\frac{1}{8}=9\)
\(...\times\frac{1}{8}=10\)
Cho \(M=\frac{\sqrt{2}-\sqrt{1}}{1+2}+\frac{\sqrt{3}-\sqrt{2}}{2+3}+\frac{\sqrt{4}-\sqrt{3}}{3+4}+...+\frac{\sqrt{2015}-\sqrt{2014}}{2014+2015}\). Hãy so sánh M với \(\frac{1}{2}\)
Sắp xếp các số từ bé đến lớn: \(\frac{1}{8}\), \(\frac{1}{6}\), \(\frac{1}{2}\), \(\frac{1}{9}\), \(\frac{1}{4}\), \(\frac{1}{3}\), \(\frac{1}{7}\), \(\frac{1}{5}\), \(\frac{1}{10}\), \(\frac{1}{100}\), \(\frac{1}{1000}\).