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=4/5.17/3-4/3.57/5
=68/15-228/15
=-160/15
=-32/3
12.23 - 13.17 - (13.23 + 13.17)
= 12.23 - 13.17 - 13.23 - 13.17
=( 12.23 - 13.23) - ( 13.17 + 13.17)
= - 13.17 . 2
= - 442
\(13.23-13.17-\left(13.23+13.17\right)\)
\(=13.23-13.17-13.23-13.17\)
\(=13.23-13.23-13.17-13.17\)
\(=0-2.13.17\)
\(=-442\)
\(\frac{-5}{23}.\frac{17}{26}+\frac{-5}{23}.\frac{9}{26}=\frac{-5}{23}.\left(\frac{17}{26}+\frac{9}{26}\right)=\frac{-5}{23}.1=\frac{-5}{23}\)
\(\frac{-21}{20}+\frac{21}{20}.\frac{3}{4}+\frac{3}{4}=\frac{21}{20}.\left(\frac{3}{4}-1\right)+\frac{3}{4}=\frac{21}{20}.\frac{-1}{4}+\frac{3}{4}=\frac{1}{4}.\left(\frac{-21}{20}+\frac{3}{4}\right)=\frac{1}{4}.\left(-\frac{3}{10}\right)=-\frac{3}{40}\)
b: \(=15\left(141+19\right)=15\cdot160=24000\)
c: \(=2^3\cdot\left(17-14\right)=8\cdot3=24\)
a, 3 . 5 2 - 16 : 2 2 = 3.25 - 16:4 = 75 - 4 = 71
b, 15.141 + 59.15 = 15.(141+59) = 15.200 = 3000
c, 2 3 . 17 - 2 3 . 14 = 8.17 - 8.14 = 8.(17 - 14) = 8.3 = 24
d, 20 - 30 - 5 - 1 2 = 20 - 30 - 4 2 = 20 - (30 - 16) = 20 - 14 = 6
a, 5 . 2 2 - 18 : 3 2
= 5.4 – 18:9
= 20 – 2 = 18
b, 17.85+15.17 – 120
= 1445+255 – 120
= 1580
c, 2 3 . 17 - 2 3 . 14
= 2 3 . ( 17 - 14 ) = 8.3 = 24
d, 20 – [30 – 5 - 1 2 ]
= 20 – (30 – 16) = 6
5/3.13 + 5/13.23 + 5/23,33
= 1,975373039 + 5/23,33
=2,18968937
`@` `\text {Ans}`
`\downarrow`
\(37.(-5)+5.17- ( 13.23+23.17 )\)
`=`\(5\cdot\left(-37+17\right)-23\left(13+17\right)\)
`=`\(5\cdot\left(-20\right)-23\cdot20\)
`=`\(20\cdot\left(-5-23\right)\)
`=`\(20\cdot\left(-28\right)=-560\)