a: =>x=3 ngày 5 giờ+3 ngày 12 giờ=6 ngày 17 giờ

b: \(=\left(0.24+0.76\right)+\left(0.64+0.36\right)=1+1=2\)

2

`=0,24xx458+(0,2xx1,2)xx126-(3xx0,08)xx484`

`=0,24xx458+0,24xx126-0,24xx484`

`=0,24xx(458+126-484)`

`=0,24xx100=24`

0,24 x 450 + 0,8 x 15 x 3 + 3 x 3 x 8

= 0,24 x 450 + 0,24 x 150 + 0,24 x 300

= 0,24 x ( 450 + 150 + 300 )

= 0,24 x 900

= 216

Toán lớp 5 dễ mà ! Thui ! ~ nyan ! Bây giờ T-I-C-H cho mik nhá !!!!

0.24*150*3+0.8*15*3+3*3*8=3(36+7.5+24)=3*67.5=202.5

=0,24 x 450 + 0,08  x 3 x 15 x 10 + 0,03 x 8 x 3 x100 

=0,24 x 450 + 0,24 x 150 + 0,24 x 300

=0,24 x ( 450+150+300)

=0,24x900

=216 

\(1,24^2-2,48\times0,24+0,24^2\)

\(=1,24-2\times1,24\times0,24+0,24^2\)

\(=\left(1,24-0,24\right)^2\)

\(=1\)

hhgggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg

\(\left(24\%+\dfrac{3}{4}+0,76+25\%\right)\times\left(\dfrac{3}{\dfrac{5}{7}}+\dfrac{1}{\dfrac{8}{28}}\right)\)

\(=\left(0,24 +0,75+0,76+0,25\right)\times\left(4,2+10,5\right)\)

\(=\left[\left(0,24+0,76\right)+\left(0,75+0,25\right)\right]\times\left(4,2+10,5\right)\)

\(=\left[1+1\right]\times\left(4,2+10,5\right)\)

\(=2\times14,7=29,4\)

\(~HT~,#Ng\)

A = \(\dfrac{13}{50}\) + 9% + 41/100 + 0,24

A = 0,26 + 0,09 + 0,41 + 0,24

A = (0,26 + 0,24) + ( 0,09 + 0,41)

A = 0,5 + 0,5

A = 1

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