7. Division (2) of decimal
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Write the missing word

    To divide a whole number by a decimal, we must remove the decimal point of the divisor and add to the dividend as many zeros there are decimal places in the divisor. Then, we divide as if these were whole numbers.

    Example: 138:1.9 1380:19

    Solve these divisions:

525 : 1,5  =

 

30 : 1,2 =

 

208 : 0,4 =

 

543 : 0,3 =

 

45 : 0,09 =

 

  To divide two decimal numbers, we must move the decimal point in the divisor to the right until it is a whole number. Then we move the decimal point in the dividend to the right by the same number of places as the decimal point was moved to make the divisor a whole number.

    Example: on the upper picture: 10. 83:1. 9     108. 3: 19   ;   11. 83:2. 7     118. 3:27

1,024 : 0,16  =

 

9,72 : 0,09 =

 

102,4 : 0,32 =

 

23,8 : 0,13 =

 

10,83 : 1,9 =

 

    Let's review the decimal numbers.

    What number is for this expression?

Ten and three hundredths

 

One and nine tenths

 

One and twenty-four thousandths

 

    Transform these decimal units.

435 hundredths =

 

2.5 Tenths =

 

6 thousandths =

 

    Subtract these decimals:

3 - 2,025 =

 

4,5 - 0,45 =

 

17,1 - 3,75 =

 
 

    Multiply these decimals:

0,2 x 1,12 =

 

3,1 x 0,7 =

 

0,05 x 700 =

 
 

     Ask how formulate problemas and then solve them:

A banana is 0.14 kilograms.
How much will 8 bananas weigh?

 

Mariano had 7.25 euros and he spent 3.5 euros in notebooks. How much money does he have?

 

A man distributes 6.75 euros among his three sons. How much money did each one receive?

 

One bottle has 1.18 liters and another has 1.2 liters. How much liters there are between the two bottles?

 

The teacher distributes 18.9 euros among his 18 students. How much money will each one receive?

 






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