viết các phân số sau thành hỗn số
8/3 = ...... 15/12=......
27/10=...... 13/4=......
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\(\dfrac{8}{3}=2\dfrac{2}{3}\)
\(\dfrac{27}{10}=2\dfrac{7}{10}\)
\(\dfrac{15}{12}=1\dfrac{3}{12}\)
\(\dfrac{13}{4}=3\dfrac{1}{4}\)
10/27: 1/27+7/27+2/27
13/12: 1/12+7/12+5/12
15/8:7/8+3/8+5/8
10/27 = 1/27+2/27+7/27
13/12 = 1/12+5/12+7/12
15/8 = 3/8+5/8+7/8
\(\frac{8}{3}=2\frac{2}{3}\) \(\frac{15}{12}=1\frac{3}{12}\)
\(\frac{27}{10}=2\frac{7}{10}\) \(\frac{13}{4}=3\frac{1}{4}\)
15 \(\frac{27}{25}\)bằng\(\frac{402}{25}\)
7\(\frac{33}{201}\)bằng\(\frac{1440}{201}\)
\(\frac{2007}{135}\)=14\(\frac{117}{135}\)
\(\frac{17}{12}\)=1\(\frac{5}{12}\)
\(\frac{126}{27}\)=4\(\frac{18}{27}\)
\(\frac{311}{39}\)=7\(\frac{38}{39}\)
a) \(15\frac{27}{25}\)=\(\frac{402}{25}\);\(7\frac{31}{201}\)=\(\frac{1438}{201}\)
b)\(\frac{2007}{135}=14\frac{13}{15}\);\(\frac{17}{12}=1\frac{5}{12}\);\(\frac{126}{27}=4\frac{2}{3}\);\(\frac{311}{39}=7\frac{38}{39}\)
1: 8=2^3
2: 25=5^2
3: 4=2^2
4: 49=7^2
5: 81=9^2
6: 36=6^2
7: 100=10^2
8: 121=11^2
9: 144=12^2
10: 169=13^2
11: 27=3^3
12: 125=5^3
13: 1000=10^3
14: 32=2^5
15: 243=3^5
16: 343=7^3
17: 216=6^3
18: 64=4^3
19: 225=15^2
20: 128=2^7
BÀI 1:
a) \(\frac{4}{5}+\frac{3}{8}+\frac{1}{4}\)
\(=\frac{32}{40}+\frac{15}{40}+\frac{10}{40}\)
\(=\frac{32+15+10}{40}\)\(=\frac{57}{40}\)
b) \(\frac{5}{9}+\frac{2}{3}+\frac{1}{2}\)
\(=\frac{10}{18}+\frac{12}{18}+\frac{9}{18}\)
\(=\frac{10+12+9}{18}=\frac{31}{18}\)
a: 13/35=1/5+1/7+1/35
b: 8/27+4/15+19/27+11/15
=8/27+19/27+4/15+11/15
=1+1=2
a) 3 và 3/4=3,75
b) 19 và 3/8=19,375
c) 27 và 2/5=27,4
\(\dfrac{8}{3}=2\dfrac{2}{3}\) \(\dfrac{15}{12}=1\dfrac{3}{12}\) \(\dfrac{27}{10}=2\dfrac{7}{10}\) \(\dfrac{13}{4}=3\dfrac{1}{4}\)
8/3=22/3
27/10=27/10
15/12=13/12
13/4= 31/4