2. Transformations

   5 tenths, how many hundredths are? Every tenth has 10 hundredths, then 5 tenths will have 50 hundredths

7 tenths =

12 tenths =

324 tenths =


    We can go from tenths to hundredths, multiplying the tenths by 10. Integers are multiplied by 10, placing a 0 on the right.

    Write the correct answer:

7 x 10 =

18 x 10 =

375 x 10 =






Decimal numbers are multiplied by 10 moving the comma one place to the right. Example: 3.2 x 10 = 32

5,4 x 10 =

19,7 x 10 =

8,45 x 10 =

18,375 x 10 =

5,7 x 10 =


     When a decimal number has zeros after the comma, at the end of the number, we can delete those zeros since they have no value.

    Write the correct answer:

3,140 =

2,200 =

437,850 =


     In order to convert the tenths to thousandths, we multiply the tenths by 100, moving the decimal comma two places to the right. Example: 7.257 tenths = 725.7 thousandths.

    Write the correct answer:

3,2 Tenths =

3,75 Tenths  =

14,789 Tenths =


     In order to convert the units to thousandths, we multiply the tenths by 1000, moving the decimal comma three places to the right. Example: 5.25 units = 5250 thousandths.

    Write the correct answer:

6 units =

3,7 units  =

14,75 units =


     In order to convert hundredths to tenths we have to do groups of 10 hundredths to do a tenth. With 30 hundredths we have 3 tenths. What we have done is to divide by 10. For this we move the comma one place to the left. Example: 50 hundredths = 5 tenths.

    Write the correct answer:

70 hundredths =

130 hundredths  =

1200 hundredths=


     In order to convert hundredths to units we have to make groups of 100, move the decimal comma two places to the left. Example: 700 hundredths = 7 units.

    Write the correct answer:

3750 hundredths =

457 hundredths  =

56,5 hundredths=


     We convert the thousandths to units dividing by 1000, moving the decimal comma three places to the left. Example: 327 thousandths = 0.327 units.

    Write the correct answer:

2525 thousandths =

5 thousandths  =

25 thousandths =


     Transformation exercises

    Write the correct answer:

8 tenths =

45 units  =

75 tenths =

1,25 units =

475 thousandths =

13 hundredths =

14 units =

27 tenths =

13 thousandths =

7 units =



 

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Mathematics |
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®Arturo Ramo García.-Record of intellectual property of Teruel (Spain) No 141, of 29-IX-1999
Plaza Playa de Aro, 3, 1º DO 44002-TERUEL