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a) 93. 85+ 17. 45-170 = 93. 17. 5+ 17.9.5-17.5.2= 17.5.( 93+ 9-2)= 85. 100 = 8500
b) \(\left(\frac{-13}{31}:\frac{5}{17}+\frac{-18}{31}:\frac{5}{17}\right).\frac{25}{34}\)
\(=\left(\frac{-13}{31}.\frac{17}{5}+\frac{-18}{31}.\frac{17}{5}\right).\frac{25}{34}\)
\(=\left(\frac{-13}{31}+\frac{-18}{31}\right).\frac{17}{5}.\frac{25}{34}\)
\(=\left(-1\right).\frac{5}{2}\)
\(=\frac{-5}{2}\)
CHÚC BN HỌC TỐT!!
a, 98.85 + 17.45 - 170 = 116.3 - 170 = -53.7
b, (-13/31 : 5/17 + -18/31 : 5/17) x 25/34 = 17/5 x ( -13/31 + -18/31) x 25/34
=17/5 x -1 x 25/34 = -5/2 = -2.5
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a) 93.85+17.45-170=8500
b) 491.(267+53) -491. (153+67) =49100
c) 45.48-90.24+145=145
d) 754.75-2262.25+4568=4568
e) 23.157+15.46 -23.87=2300
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17.70+17.45-17.15
=17.(70+45-15)
=17.100
=1700
6.3^3-162:3^2+2016^0
=6.27-162:9+1
=162-18+1
=45
17 . 70 + 17 . 45 - 17 . 15
= 17 . (70 + 45 - 15)
= 17 . 100
= 1700
\(6 . 3^3 - 162 : 3^2 + 2016^0\)
= 6 . 27 - 162 : 9 + 1
= 162 - 18 + 1
= 144 + 1
= 145
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\(93.85+17.45-170\)
\(=7905+765-170\)
\(=8670-170\)
\(=8500\)
k cho mình nhé bạn
93.85+17.45-170
=93.85+(17.5).(45:5)-170
=93.85+85.9-170
=(93+9).85-170
=112.85-170
=9350