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1313/1717 = 13/17
102102/109109 = 102/109
424242/535353 = 42/53
103103103/109109109 = 103/109
1.
\(\frac{20}{400}=\frac{1}{20}\) ; \(\frac{333}{555}=\frac{3}{5}\) ; \(\frac{1212}{2323}=\frac{12}{23}\) ; \(\frac{123123}{102102}=\frac{123}{102}\)
2. Ta có :
A . 11/24 = 33/72 .
B . 15/25 = 3/5 ; 12/16 = 3/4 ; Vì 3/5 < 3/4 nên 15/25 < 12/16 .
1.
20/400=1/20
333/555=3/5
1212/2323=12/23
123123/102102=41/34
Ta có:
\(\dfrac{3434}{7878}=\dfrac{3434:202}{7878:202}=\dfrac{17}{39}\)
\(\Rightarrow\dfrac{3434}{7878}< \dfrac{20}{39}\)
\(-------\)
Ta có:
\(\dfrac{123123}{405405}=\dfrac{123123:1001}{405405:1001}=\dfrac{123}{405}\)
\(\Rightarrow\dfrac{123123}{405405}>\dfrac{123}{1109}\)
\(---------\)
Ta có:
\(\dfrac{666666}{323232}=\dfrac{666666:80808}{323232:80808}=\dfrac{8,25}{4}\)
\(\Rightarrow\dfrac{666666}{323232}< \dfrac{25}{4}\)
\(\dfrac{90}{120}=\dfrac{30.3}{30.4}=\dfrac{3}{4}\)
\(\dfrac{15}{25}=\dfrac{5.3}{5.5}=\dfrac{3}{5}\)
\(\dfrac{18}{45}=\dfrac{9.2}{9.5}=\dfrac{2}{5}\)
\(\dfrac{36}{64}=\dfrac{4.9}{4.16}=\dfrac{9}{16}\)
\(\dfrac{32}{72}=\dfrac{8.4}{8.9}=\dfrac{4}{9}\)
\(\dfrac{84}{49}=\dfrac{7.12}{7.7}=\dfrac{12}{7}\)
\(\dfrac{90}{120}=\dfrac{3}{4};\dfrac{15}{25}=\dfrac{3}{5};\dfrac{18}{45}=\dfrac{2}{5};\dfrac{36}{64}=\dfrac{9}{16};\dfrac{32}{72}=\dfrac{4}{9};\dfrac{84}{49}=\dfrac{12}{7}\)
\(\left(1+\dfrac{100}{20}\right)\) x \(\dfrac{125}{60}\)
\(=6\) x \(\dfrac{125}{60}\)
\(=\dfrac{750}{60}=\dfrac{25}{2}\)
Lời giải:
$\frac{102102}{405405}=\frac{1001\times 102}{1001\times 405}=\frac{102}{405}=\frac{3\times 34}{3\times 135}=\frac{34}{135}$
= 34/125 bạn hãy vote cho mk nhé