a) 27 × 10 = 270;    72 × 100 = 7200;    14 × 1000 = 14000

86 × 10 = 860;     103 × 10 = 10300;    452 × 1000 = 452000

358 × 10 = 3580;     1977 × 100 = 197700;    300 × 1000 = 300000

b) 80 :10 = 8;     400 : 100 = 4    ;6000 : 1000 = 6

300 : 10 = 30;     4000 : 100 = 40    ; 60000 : 1000 = 60

2000 :10 = 200;     40000 :100 = 400    ;600000 : 1000 = 600

c) 64 × 10 = 640;    32 × 100 = 3200;    95 × 1000 = 95000

640 : 10 = 64;     3200 : 100 = 32;    95000 : 1000 = 95

\(x:33=\dfrac{9}{66}\)
\(x=\dfrac{9}{66}\times33\)
\(x=\dfrac{9}{2}\)
\(\dfrac{4}{5}\times x=\dfrac{10}{11}:\dfrac{3}{4}\)
\(\dfrac{4}{5}\times x=\dfrac{40}{33}\)
\(x=\dfrac{40}{33}:\dfrac{4}{5}\)
\(x=\dfrac{50}{33}\)
#Đạt Đang Bận Thở

x : 10 x 100 = 1000 + 100

x : 10 x 100 = 1100

x : 10 = 1100 : 100

x : 10 = 11

       x = 11 x 10

       x = 110

x : 10 x 100 = 1000 + 100

x : 10 x 100 = 1100

x : 10 = 1100 : 100

x : 10 = 11

        x = 11 x 10

        x = 110

a) 63 × 100 : 10 = 6300 : 10 = 630

b)960 × 1000 : 100 = 960000 : 100 = 9600

c)79 × 100 : 10 = 7900 : 10 = 790

d)90000 : 1000 × 10 = 90 × 10 = 900

a ) 18 x 10 = 180

18 x 100 = 1800

18 x 1000 = 18000

82 x 100 = 8200

75 x 1000 = 75000

19 x 10 = 190

256 x 1000 = 256000

302 x 10 = 3020

400 x 100 = 40000

b ) 9000 : 10 = 900

9000 : 100 = 90

9000 : 1000 = 9

6800 : 100 = 68

420 : 10 = 42 

2000 : 1000 = 2

20020 : 10 = 2002

200200 : 100 = 2002

2002000 : 1000 = 2002

a)18 x 10 = 180

18 x 100 = 1 800

18 x 1000 = 18 000

82 x 100 = 8 200

75 x 1000 = 75 000

19 x 10 = 190

256 x 1000 = 256 000

302 x 10 = 3 020

400 x 100 = 40 000

b)9000 : 10 = 900

9000 : 100 = 90

9000 : 1000 = 9

6800 : 100 = 68

420 : 10 = 42

2000 : 1000 = 2

20 020 : 10 = 2 002

200 200 : 100 = 2 002

2 002 000 : 1000 = 2 002

Hướng dẫn giải:

625 x 10 = 6250

540 : 10 = 54

3456 x 100 = 345 600

63 000 : 100 = 630

302 761 x 1000 = 302 761 000

1 011 000 : 1000 = 1011

Hướng dẫn giải:

625 x 10 = 6250

540 : 10 = 54

3456 x 100 = 345 600

63 000 : 100 = 630

302 761 x 1000 = 302 761 000

1 011 000 : 1000 = 1011

a) 160 = 16 × 10

4500 = 45 × 100

9000 = 9 × 1000

c) 70000 = 70 × 1000

70000 = 700 × 100

70000 = 7000 × 10

b) 8000 = 8 × 1000

800 = 8 × 100

80 = 8 × 10

d) 2020000 = 202 × 10000

2020000 = 2020 × 1000

2020000 = 202000 × 10

=>x-4368=13936

hay x=18304

\(x : 11 - 145 = 526\)

\(x : 11 = 526 + 145\)

\(x : 11 = 671\)

\(x = 671 \) x \(11\)

\(x = 7381\)

Vậy \(x=7381\)

x:11 = 671

x = 61