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2019 + 2019 +2019 + 2019 + 2019 x 7 - 2019
= 2019 x ( 7 +1 +1+1 - 1 ) = 2019 x 10 = 20190
2019 x 45 + 54 x 2019 + 2019/2019 x 2022 - 2018 x 201
=2019*(45+54+1)-2018
=2019*100-2018
=201900-2018
=199882
2019 x 45 + 54 x 2019 + 2019/2019 x 2022 - 2018 x 201
=2019*(45+54+1)-2018
=2019*100-2018
=201900-2018
=199882
( 1 + 3 + 5 + 7 +...+ 2019) \(\times\) ( 4848 \(\times\) 75 - 7575 \(\times\) 48):51
=(1 + 3 + 5 + 7 +...+2019)\(\times\)( 48 \(\times\) 101 \(\times\) 75 - 75 \(\times\) 101 \(\times\)48):51
=(1+3+5+7+...+2019) \(\times\) ( 48 \(\times\) 101 \(\times\) 75 - 48 \(\times\) 101 \(\times\) 75):51
=(1+3+5+7...+2019)\(\times\)0 : 51
= 0: 51
= 0
\(a.=\dfrac{2019}{2020}\times\left(\dfrac{4}{11}+\dfrac{5}{11}+\dfrac{2}{11}\right)\\ =\dfrac{2019}{2020}\times1=\dfrac{2019}{2020}\\ b.=\dfrac{25}{27}\times\left(\dfrac{17}{14}-\dfrac{1}{14}-\dfrac{2}{14}\right)\\ =\dfrac{25}{27}\times1=\dfrac{25}{27}\)
C1 : 2019x7895+2019x234578
=2019x(7895+234578)
=2019x242473
=489552987
C2 : 2019x7895+2019x234578
=15940005+473612982
=489552987
C1: 2019 x (7895 + 234578)
= 2019 x242.473
=489.552.987
C2: 2019x 7895 + 2019 x 234578
=15.940.005 + 473.612.982
= 489.552.987
=2019x10=20190
=2019x10=20190