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HU
1
NH
21 tháng 8 2020
\(20,18\times2\frac{2}{5}+201,8\times\frac{97}{22}\times220\%+0,006\times2018\)
\(=20,18\cdot\frac{12}{5}+20,18\cdot10\cdot\frac{97}{22}\cdot\frac{22}{10}+0,006\cdot100\cdot20,18\)
\(=20,18\cdot\frac{12}{5}+20,18\cdot\frac{970}{22}\cdot\frac{22}{10}+0,6\cdot20,18\)
\(=20,18\cdot\frac{12}{5}+20,18\cdot97+\frac{3}{5}\cdot20,18\)
\(=20,18\cdot\left(\frac{12}{5}+\frac{3}{5}\right)+20,18\cdot97\)
\(=20,18\cdot3+20,18\cdot97\)
\(=20,18\cdot\left(97+3\right)\)
\(=20,18\cdot100\)
\(=2018\)
PN
9
26 tháng 5 2018
20.18 x 89 + 20.18 x 0.2 + 20.18 x 0.5 + 20.18 x 0.25
= 20.18 ( 89 + 0.2 + 0.5 + 0.25 )
= 360 . 89,95
= 32382
Ủng hộ ae ơiii
26 tháng 5 2018
20.18 x 89 + 20.18 x 0.2 + 20.18 x 0.5 + 20.18 x 0.25
= 20.18 x ( 89 + 0.2 + 0.5 + 0.25)
= 2018 x 89.95
= 1815.191
JJ
3
27 tháng 11 2018
\(20,18\cdot37,5+201\cdot8+4,5+201,8\cdot1,75\)
\(=756,75+1608+4,5+353,15\)
\(=2364,75+357,65\)
\(=2722,4\)
22 tháng 5 2019
\((2,5\cdot x+2017)\cdot2018=(7,5+2017)\cdot2018\)
\(\Rightarrow(2,5\cdot x+2017)\cdot2018=4085441\)
\(\Rightarrow2,5\cdot x+2017=2024,5\)
\(\Rightarrow2,5x=7,5\)
\(\Rightarrow x=7,5:2,5=3\)
22 tháng 5 2019
\(3\frac{1}{5}+\frac{2}{5}\left[x+\frac{1}{3}\right]=\frac{21}{5}\)
\(\Rightarrow\frac{16}{5}+\frac{2}{5}\left[x+\frac{1}{3}\right]=\frac{21}{5}\)
\(\Rightarrow\frac{2}{5}\left[x+\frac{1}{3}\right]=\frac{21}{5}-\frac{16}{5}\)
\(\Rightarrow\frac{2}{5}\left[x+\frac{1}{3}\right]=1\)
\(\Rightarrow x+\frac{1}{3}=\frac{5}{2}\)
\(\Rightarrow x=\frac{13}{6}\)
PV
1
17 tháng 6 2021
( 1 + \(\dfrac{2}{5}\)).( 1 + \(\dfrac{2}{7}\) ).( 1 + \(\dfrac{2}{9}\)).( 1 + \(\dfrac{2}{11}\)).....( 1 + \(\dfrac{2}{97}\)).( 1 + \(\dfrac{2}{99}\))
= \(\dfrac{7}{5}\).\(\dfrac{9}{7}\).\(\dfrac{11}{9}\).\(\dfrac{13}{11}\)...\(\dfrac{99}{97}\).\(\dfrac{101}{99}\)
= \(\dfrac{7.9.11.13...99.101}{5.7.9.11...97.99}\)
= \(\dfrac{101}{5}\)
❤ HOK TT ❤
27 tháng 1 2018
a) ( x -21 * 13) : 11 = 39 => x - 21*13 = 39 * 11 => x - 273 = 429 => x= 429 + 273 => x= 702 b) ( x - 21) * 13 : 11 = 39 => (x-21)*13=39:11 => (x-21)*13=429 => x-21=429:13 => x-21=33 => x=33+21 => x=54
13 tháng 6 2023
`@` `\text {Ans}`
`\downarrow`
`2023 \times 14 + 2023 \times 83+97`
`= 2023 \times (14+83) + 97`
`= 2023 \times 97 + 97`
`= 196231 +97`
`= 196328`
`78 \times 31+78 \times 24+78 \times 17+78 \times 22 \times 72`
`= 78 \times (31+24+17+22 \times 72)`
`= 78 \times (31+24+17+1584)`
`= 78 \times 1656`
`= 129168`
`371 \times 69+371 \times 14+629 \times 83`
`= 371 \times (69+14) + 629 \times 83`
`= 371 \times 83 + 629 \times 83`
`= 83 \times (371+629)`
`= 83 \times 1000`
`= 83000`
`91 \times 51+49 \times 163-49 \times 72`
`= 91 \times 51 + 49 \times (163-72)`
`= 91 \times 51+49 \times 91`
`= 91 \times (51+49)`
`= 91 \times 100`
`= 9100`
`3 \times 12 \times 17 + 4 \times 9 \times 81 + 2 \times 6 \times 6`
`= 9 \times 4 \times 17 + 4 \times 9 \times 81 + 4 \times 9 \times 2`
`= 9 \times 4 \times (17+81+2)`
`= 36 \times 100`
`= 3600`
`42 \times 17 + 58 \times 83 \times 42 \times 83 + 42 \times 83 + 17`
`= 17 \times (42+58) + 42 \times 83 \times (58 \times 83 +1)`
`= 17 \times 100 + 3486 \times 4815`
`= 1700 + 16785090`
`= 16786790`
bn vt hỗn số kiểu j dzậy????
\(20,18\cdot2\frac{2}{5}+201,8\cdot\frac{97}{22}\cdot220\%+0,006\cdot2018\)
\(=2018\cdot\frac{1}{100}\cdot2\frac{2}{5}+2018\cdot\frac{1}{10}\cdot\frac{97}{22}+\frac{6}{1000}+2018\)
\(=2018\cdot\left(\frac{1}{100}\cdot2\frac{2}{5}+\frac{1}{10}\cdot\frac{97}{22}+6\cdot\frac{1}{1000}\right)\)
\(=2018\cdot\left[\frac{1}{1000}\cdot\left(6+100\cdot\frac{97}{22}+10\cdot2\frac{2}{5}\right)\right]\)
\(=\frac{1009}{500}\cdot\left[10\cdot\left(10\cdot\frac{97}{22}+\frac{12}{5}\right)\right]\)
\(=\frac{1009}{50}\cdot45\frac{12}{5}=\frac{239133}{250}\)