500 × 4 × 2 × 25 - 500 × 3 × 2 × 30

= 500 × (4 × 2 × 25) - 500 × (3 × 2 × 30)

= 500 × 200 - 500 × 180

= 500 × (200 - 180)

= 500 × 20

= 10000

a) 4.25-12.5+170:10

=100-60+17

=40+17

=57

b) (7+3³:3²).4-3

=(7+3).4-3

=10.4-3

=40-3

=37

c) 12:{400:[500-(125+25.7)]}

=12:{400:[500-(125+175)]}

=12:{400:[500-300]}

=12:{400:200}

=12:2

=6

d) 168+{[2.(2⁴+3²)-256⁰]:7²}

=168+{[2.(16+9)-1]:49}

=168+{[2.25-1]:49}

=168+{[50-1]:49}

=168+{49:49}

=168+1

=169

500x6+500x4-108:12:9

=500x(6+4)-9:9

=500x10-1

=5000-1

=4999

9782x35-9782x25+1000:5:2

=9782x(35-25)+200:2

=9782x10+100

=97820+100

=97920

37800:25:4+57+467x43

=1512:4+57+20081

=378+57+20081

=435+20081

=20516

=> 25 x 15 + 25 x 3 + 2 x 25 = 500

25 x 15 + 25 x 3 + 2 x 25 = 500 nha bạn

25X15+25X3+2=500

\(a,250:25+1750:25+500:25=\left(250+1750+500\right):25=2500:25=100\\ b,\left(480\times25\right):60=\left(480:60\right)\times25=8\times25=200\)

a) \(250:25+1750:25+500:25\)
\(=\left(250+1750+500\right):25\)
\(=2500:25\)
\(=100\)

b: =8x25=200

a: =10+70+20=100

X là: 500÷25×100=2000

Số x là:
\(500:25\times100=2000\)
Đáp số: 2000

500:25=2000

\(10=2.5\\ 15=3.5\\ 25=5^2\\ \Rightarrow BCNN\left(10,15,25\right)=2.3.5^2=150\\ \Rightarrow x\in BC\left(10,15,25\right)=B\left(150\right)=\left\{0;150;300;450;600;...\right\}\\ \text{Mà }x< 500\\ \Rightarrow x\in\left\{0;150;300;450\right\}\)