a) 2 100 : 10 = 210

    4 500 : 100 = 45

    83 000 : 1 000 = 83

b) 720 : 10 : 8 = 72 : 8 = 9

    1 500 : (5 x 100) = 1 500 : 5 : 100 = 300 : 100 = 3

    60 000 : 1 000 x 6 = 60 x 6 = 360

D

D

3000 : 10 x 500 = 300 x 500 = 150000

2000 : 100 x 600 = 20 x 600 = 12000

\(\left(366+434\right)\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\)

\(=800\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\)

\(=\left(800+199+1\right)\times\frac{1009}{500}\)

\(=1000\times\frac{1009}{500}\)

\(=2018\)

~ Thiên Mã ~

\(\left(366+434\right)\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\)

\(=800\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\times1\)

\(=\left(800+199+1\right)\times\frac{1009}{500}\)

\(=1000\times\frac{1009}{500}\)

\(=\frac{1009000}{500}=2018\)

100+500+900+300+500+700+400+800+600+200*10

=(100+900)+(500+500)+(300+700)+(400+600)+(800+200)*10

=(1000+1000+1000+1000+1000)*10

=5000*10

=50000

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D

D

5/10 = 1/2

50/100 = 1/2

100/200 = 1/2

500/250 = 2

20/10 = 2

1200/2400 = 1/2

3/21 = 1/7

7/14 = 1/2

30/10 = 3

500/500 = 1

1000/1000 = 1

Nhớ k cho mình nhé!

5/10=0,5;  50/100=0,5;    100/200=0,5;   500/250=2;

20/10=2;   1200/2400=0,2;   3/21=1/7;    7/14=0,2

30/10=3;   500/500=1;   1000/1000=1

k nha bạn

x + 500 = 600 + 500

=> x +500 = 1100

=> x= 1100- 500

=> x = 600

x + 500 = 600 + 500

x + 500 = 1100

x           = 1100 - 500

x            = 600

x + 600 = 500 + 500

x + 600 = 1000

x          = 1000 - 600

x          = 400

x+600=1000

x         =1000-600

x        =400

k cho mik với