a) 1,4 × 10 = 14

2,1 × 100 = 210

7,2×1000 = 7200

b) 9,63 × 10 = 96,3

25,08 × 100 = 2508

5,32 × 1000 = 5320

c) 5,328 × 10 = 53,28

4,061 × 100 = 406,1

0,894 × 1000 = 894

bài 1 :Nhân nhẩm

a) 1,4 × 10 = 14

2,1 × 100 = 210

7,2 × 1000 = 7200

b) 9,63 × 10 = 96,3

25,08 × 100 = 2508

5,32 × 1000 = 5320

c) 5,328 × 10 = 53,28

4,061 × 100 = 406,1
0,894 × 1000 = 894

`a) 1,4 × 10=14`

`2,1 × 100=210`

`7,2 × 1000=7200`

`b) 9,63 × 10=96,3`

`25,08 × 100=2508`

`5,32 × 1000=5320`

`c) 5,328 × 10=53,28`

`4,061 × 100=406,1`

`0,894 × 1000=894`

53,28

406,1

894

2,1 x 100 =210

25,08 x 100=2508

4,061 x 100=406,1

7,2 x 1000=7200

5,32 x 100=532

0,894x1000=894

9,63 x 10=96,3

5,328x10=53,28

2,1 x 100 = 210

25,08 x 100 = 2508

4,061 x 100 = 406100

7,2 x 1000 = 7200

5,32 x 100 = 532

0,894 x 1000 = 894

9,63 x 10 = 96,3

5,328 x 10 = 53.28

\(2.1\cdot100=210\)

\(25.08\cdot100=2508\)

\(4.061\cdot100=406.1\)

\(7.2\cdot1000=720\)

\(5.32\cdot100=532\)

\(0.894\cdot1000=894\)

\(9.63\cdot10=96.3\)

\(5.328\cdot10=53,28\)

96,3

2508

5320

9,63 x 10 = 96,3

25,08 x 100 = 2508

5,32 x 1000 = 5320

1,4 x 10 = 14

2,1 x 100 = 210

7,2 x 1000 = 7200

9,63 x 10 = 96,3

25,08 x 100 = 2508

5,32 x 1000 = 5320

14

210

7200

53,28

406,1

894

104 cm

1260 cm

85,6 cm

57,5 cm

53,28

406,1

894

14,8

512

2571

155

90

100