MO1-L12 Money-Decimals Practice

MONEY: L1      (45-70mins)      Date/Time:       Tutor:                 

 (Part 1) Revise (10-15mins)                                 Start Time:                 

1. Add/Subtract money in decimal notation

https://themathbooklets.blogspot.sg/2016/10/speed-and-time.html

2. Common Terms in Word Problems

https://themathbooklets.blogspot.sg/2017/07/word-problems-vocabulary.html

(Part2) Practice (~50mins)

Tutor: Please observe and ensure that the student follows the method/step. 

                                               Start Time:                     End Time:               

(I) Add/Subtract Money (~15 mins)                      Working

Do the followings:

1.  $7.35 + $0.65 

2.  $47.65 + $6.80 

3.  $37.90 + $22.70

4.  $9.70 + $7.90

5.  Find the sum of $27.85 and $3.15

Do the followings:

6.   $24.15 - $9.60

7.   $15.40 - $8.65

8.   $76.65 - $23.05

9. Find the difference between $25.00 and $16.25

(II) Word Problems/PSLE (~35 mins)                            Working

Start Time:                     

10.  Mickey had an equal number of $2 notes and $5 notes.

He had $42 altogether. What was the total value of $5 notes Mickey had? (11/p2/18f)

11.  Amy has 3 times as much savings as Billy. Charlie has $70 more savings than Billy. How much savings does Charlie have if their total savings is $815? (12/p2/18f)

12.  Rajah paid $5 for a box of 20 pencils. What was the cost of each pencil?

For questions 13-14

Seven classes of pupils went to a concert. Each class paid $144 for the concert tickets. 

13.  How much was spent on concert tickets? 

14.  Each pupil paid $6 for the ticket. How many pupils went for the concert?

15.    Bicycle for Rent: 

                   First hour: $7. 

                   Every additional ½ hour: $3

Irene rented a bicycle for 3 hours. How much did she pay?

16. 

         Mass Step                          Hong Kong   New Zealand

         First 20 g                              $0.65                  $1.10        

         Every additional 10 g        $0.25                  $0.35

Fiona sent a letter weighting 32g to Hong Kong and a letter weighing 10g to New Zealand by airmail. How much did she pay altogether?

17.  Cupcakes are sold at Han’s Bakery at the prices shown below.

Emma spent a total of $50 on 16 chocolate cupcakes and some strawberry cupcakes. How many strawberry cupcakes did Emma buy? (13/p1/18s)

(1) 6

(2) 9

(3) 10

(4) 18                                                                                                             (           )

18.  Molly wanted to buy 7 identical dresses but found that she was short of $14.50. In the end, she bought 5 of the dresses and had $8.50 left. Find the cost of each dress. (2/p2/18s)

19.  At a bakery, Jack paid $12.40 for a banana cake and 4 egg tarts. Sean paid $25.20 for a banana cake and 20 egg tarts. Raymond bought 5 banana cakes. How much did he pay?

Answer Keys
1.   $8.00
2.   $54.45
3.   $60.60
4.   $17.60
5.   $31.00
6.   $14.55
7.   $6.75
8.   $53.60
9.   $8.75
10. $30
11.  $219
12.  25 cents
13.  $1008
14.  $168
15.  $12
16.  $2.25
17.  2
18.  $12.50
19.  $41

MO1 Money

Different countries use different symbols($, £,€) and names(dollar, Rupiah, Ringgit).

     

DOLLARS AND CENTS

Let’s use the Singapore Currency: dollar and cent ($ and ¢)
               1 dollar = 100 cents -> $1 = 100 ¢

Money can be used as

  (1)  A measure of value

      My pen costs $1.20, the bus fare is $1.20 for adults

  (2)  A means of payment

I paid $25 for the football.

The total bill for the grocery is $45.20

Twelve dollars and fifty cents is written as:

       

CONVERSION BETWEEN DOLLARS AND CENTS

                        $1 = 100¢                           $10 = 1000¢ (100 x 10)

                        -> 100¢ = $1

                        ->   10¢ = $0.10 (1 divide by 10)

                        ->     1¢ = $0.01 (1 divide by 100)

                        ->     1¢ = $ 1/100

=> Convert cents to dollars: divide (÷) by 100

=> Convert dollars to cents: multiply (x) by 100

Example

Write 540¢ as dollars and cents

Method

Step1: ‘Divide’ numbers by 100 => shift ‘decimal’ by 2 to left.

            

Step2: Put ‘$’ sign at start of number

            $5.40

Example

Write $23.45 as cents

Method

Step1: Multiply numbers by 100

            23.45 x 100 = 2345

Step2: Write the cents symbol at end of number

            2345¢

COMPARING AMOUNT OF MONEY

Expensive/More Expensive                             Cheap/Cheaper

Most Expensive                                                           Cheapest

CHANGE/SAVING

Example

Mary bought a pair of shoes for $30. She gave a $50 notes to the cashier. What is the change she receives from the cashier?

  $50 - $30 = $20

Mary receives a change of $20.

Example

Judy has $2 for her pocket money. She spent $120. What is her savings?

            $2 - $1.20 = 80 cents

Judy’s saving is 80cents.

          ~~~~ END ~~~~~ :)