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=(198 : 2) x 444 x 2 x 132) : 25) / 33) x 8888) : 5) x 66) : 125) x 5 =66009449.5949
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a; 54 : 72 x 18 : 15
= 0,75 x 18 : 15
= 0,75 x 1,2
= 0,9
b, 25 : 8 x 36 : 50
= (25 : 50) x (36 : 8)
= 0,5 x 4,5
= 2,25
=
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a) (1314 - 808) ÷ 23 + 1995 = 506 ÷ 23 + 1995
= 22 + 1995 = 2017
b) x × 25 = 15 4
x = 15 4 ÷ 25
x = 15 4 ÷ 25 = 0,15.
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( 5346 - 2808 ) : 54 - 6,48
= 2538 : 54 - 6,48
= 47 - 6,48
= 40,52
Chúc bạn học tốt !
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20,19*45+20,19+54*20,19
=20,19*45+20,19*1+54*20,19
=20,19*(45+1+54)
=20,19*100
=2019
75,8-7,58*3-5*7,58-7,58
=7,58*10-7,58*3-5*7,58-7,58*1
=7,58*(10-3-5-1)
=7,58*1
=7.58
\(20,19\times45+20,19+54\times20,19\)
\(=20,19\times45+20,19\times1+54\times20,19\)
\(=20,19\left(45+1+54\right)\)
\(=20,19\times100\)
\(=2019\)
\(75,8-7,58\times3-7,58\times5-7,58\)
\(=75,8\times10-7,58\times3-7,58\times5-7,58\times1\)
\(=75,8\left(10-3-5-1\right)\)
\(=75,8\times1\)
\(=75,8\)
154 - 54 : 3 + 2 x ( 108 : 9 + 125 x 5 )
= 154 - 18 + 2 x ( 108 : 9 + 125 x 5 )
= 136 + 2 x ( 12 + 625 )
= 136 + 2 x 637
= 136 + 1274
= 1410
=1410 bn nha
tk mk nha
chúc bn hk giỏi