Toán tiếng Anh tiểu học – Money (Tiền tệ)

Hello! Welcome to my Positive classroom.

Xin chào! Chào mừng bạn đến với Lớp Học Tích Cực của tôi.

Today we’re going to learn about MONEY, (the value of coins, and dollar bills, how to change money, and how to add, subtract money).

Hôm nay, chúng ta sẽ học về TIỀN, bao gồm giá trị các đồng xu, tiền giấy, cách đổi tiền và cộng, trừ tiền Đô-la Mĩ.

Coins and dollar bills

We start with coins which are metal pieces of money in the United States.

Chúng ta bắt đầu với các đồng tiền xu Mĩ.

Khi ta đếm, hãy bắt đầu từ đồng xu có giá trị lớn nhất đến đồng có giá trị nhỏ nhất.

Ví dụ: What is the total value of the coins?

The total value of the coins is $0.91.

Dollar bills:

Dollars and cents

The symbol for the dollar is $, for cent is ¢.

When writing money, we also use the decimal point(.) to separate the cents from the dollars.

For example,

2 dollars can be written as $2 or $2.00.

30 cents can be written as 30¢ or $0.30.

2 dollars and 30 cents are written as $2.30 only.

Changing dollars and cents

$1 = 100¢

For example,

$1 = 100¢

$3  =   300¢

$3.70  = 300¢  +  70¢ = 370¢

Adding and subtracting money                           

Adding money

Method 1

Step 1: Add the dollars first.

Step 2: Then add the cents.  Regroup if necessary.

Method 2

Step 1: Arrange the amounts in columns. Then add the cents (regroup if necessary)

Step 2: Add the dollars

Subtracting money

Method 1

Step 1: Subtract the dollars first.

Step 2: Then subtract the cents. Regroup if necessary.

Method 2

Step 1: Arrange the amounts in columns. Then subtract the cents (regroup if necessary).

Step 2: Subtract the dollars.

More Examples

Example 1.

What is the total value of the bills and coins?

Let’s count: $10 –> $15 –> $15.50 –> $15.75 –> $15.85 –> $15.90

Example 2.

Dana has 2 quarters, 3 dimes, and 4 nickels. Veronica has 1 half-dollar, 1 quarter, 1 dime, and 10 pennies.

Who has more money?

Solution:

Dana has 2 quarters, 3 dimes, and 4 nickels.

= 50¢ + 30¢ +20¢ = 100¢

Veronica has 1 half-dollar, 1 quarter, 1 dime, and 10 pennies.

= 50¢ + 25¢ + 10¢ + 10¢ = 95¢

So, Dana has more money.

Học Toán tiếng Anh với giáo viên liên hệ: 0353150072 (Zalo)

Let’s do

Problem 1:

Sara, Ben, and Tory buy baked goods at the sale. Sare spends $3.65, Ben spends $3.05, and Tony spends $3.55. Put the amounts in order from greatest to least. Who spends the most?

Problem 2:

Luc has 2 half-dollars, 3 dimes, and 4 nickels. Martha has 3 quarters, 2 dimes, 2 nickels, and 5 pennies. Does the person with more coins have more money? Explain your thinking.

Problem 3:

Fill in the correct answers.

• $4.20   +   $2.70     =  _________
• $9.90   +   $21.40   =  _________
• $ 12.65  +  $5.40   =  _________
• _____  – $11.45   =  $20.05
• _____  – $7.65    =  $14.10
• _____  – $23.30  =  $35.85

Problem 4:

David had $13.20 in his money bank. His mother gave him another $15.50. How much did he have altogether?

Problem 5:

Trina had $20. She spent $5.80 on food. How much had she left?

Ths. Toán Nguyễn Thùy Dung