1/4-3/5-75/100
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19/20x2/100+19/20x2/100
= [19/20+19/20]x2/100
= 38/20x2/100
= 19/500
75/76x102/100-75/76x2/100
= [102/100-2/100]x75/76
= 1x75/76
= 75/76
3x7/10+7/10x5+2x7/10
= [3+5+2]x7/10
= 10x7/10
= 7
giá trị biểu thức
2/5+2/3x3/4
= 2/5+1/6
= 17/30
1/2x1/3-1/8
= 1/6-1/8
= 1/24
[1/2+1/3]:3/9
= 5/6:3/9
= 5/2
nhớ tick cho tớ nhé
a: \(2\dfrac{2}{10}=2,2\)
\(4\dfrac{31}{100}=4,31\)
9/10=0,9
51/10=5,1
75/100=0,75
125/100=1,25
1075/1000=1,075
\(14\dfrac{17}{100}=14,17\)
b: 1/2=0,5
3/4=0,75
4/5=0,8
5/8=0,625
\(2\dfrac{1}{2}=2,5\)
\(3\dfrac{1}{4}=3,25\)
\(1\dfrac{3}{5}=1,6\)
\(4\dfrac{3}{8}=4,375\)
A=1/4 - 3/5 + 75/100
A=25/100-60/100+75/100
A=\(\frac{25-60+75}{100}\)
A=40/100
A=2/5
\(A=\frac{1}{4}-\frac{1}{3}+\frac{75}{100}\)
\(A=\frac{1}{4}-\frac{1}{3}+\frac{3}{4}\)
\(A=\left(\frac{1}{4}+\frac{3}{4}\right)-\frac{1}{3}\)
\(A=0-\frac{1}{3}\)
\(A=\frac{-1}{3}\)
_Chúc bạn học tốt_
\(\dfrac{4}{7}-\dfrac{1}{3}< \dfrac{1}{2}-\dfrac{2}{9}\)
\(\dfrac{125}{100}-\dfrac{48}{64}< \dfrac{6}{7}-\dfrac{14}{28}\)
\(\dfrac{7}{5}-\dfrac{22}{25}=\dfrac{1}{5}+\dfrac{4}{10}\)\(\dfrac{45}{75}+\dfrac{22}{33}>\dfrac{4}{5}+\dfrac{4}{6}\)
\(\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{8}{10}+\frac{26}{39}+\frac{75}{100}\)
\(=\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{4}{5}+\frac{2}{3}+\frac{3}{4}\)
\(=\left(\frac{1}{3}+\frac{2}{3}\right)+\left(\frac{1}{4}+\frac{3}{4}\right)+\left(\frac{1}{5}+\frac{4}{5}\right)\)
\(=1+1+1\)
\(=3\)
1/3 + 1/4 + 1/5 + 8/10 + 26/39 + 75/100
= 7/12 + 1/5 + 8/10 + 26/39 +75/100
= 47/60 + 8/10 + 26/39 + 75/100
= 19/12 + 26/39 + 75/100
= 52/ 117 + 75/100
= 559/400
a,Ta có:\(\frac{1}{2}=\frac{1\times50}{2\times50}=\frac{50}{100}=50\%\)
b,\(\frac{3}{5}=\frac{3\times20}{5\times20}=\frac{60}{100}=60\%\)
Vậy...........
\(\dfrac{1}{4}-\dfrac{3}{5}-\dfrac{75}{100}=\dfrac{1}{4}-\dfrac{3}{5}-\dfrac{15}{20}=\dfrac{5-12-15}{20}=\dfrac{-22}{20}=\dfrac{-11}{10}\)