Money Combinations

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Answer Key & Explanations

Money Combinations · Grade 2 · Worksheet 1

1. A rectangular classroom has desks arranged in 5 rows. Each row has 8 desks. How many desks are there in total? Answer: 40 Solution: There are 5 rows of desks. Each row has 8 desks. To find the total number of desks, multiply the number of rows by the number of desks in each row: 5 × 8 5 × 8 = 40 The answer is 40.
   Full step-by-step solution

   Step 1: There are 5 rows of desks. Step 2: Each row has 8 desks. Step 3: To find the total number of desks, multiply the number of rows by the number of desks in each row: 5 × 8 Step 4: 5 × 8 = 40 The answer is 40.

2. 53 + 29 = ? Answer: 82 Solution: Add the ones: 3 + 9 = 12 Write down the 2 ones and carry over the 1 ten Add the tens: 5 + 2 + 1 (carried over) = 8 Combine the tens and ones: 80 + 2 = 82 The answer is 82.
   Full step-by-step solution

   Step 1: Add the ones: 3 + 9 = 12 Step 2: Write down the 2 ones and carry over the 1 ten Step 3: Add the tens: 5 + 2 + 1 (carried over) = 8 Step 4: Combine the tens and ones: 80 + 2 = 82 The answer is 82.

3. 25 + 47 = ? Answer: 72 Solution: Write the numbers vertically in your mind, aligning the digits by place value (ones and tens). 25 + 47 Add the digits in the ones column first. 5 (from 25) + 7 (from 47) = 12.
   Full step-by-step solution

   Let's add 25 and 47 step by step. Step 1: Write the numbers vertically in your mind, aligning the digits by place value (ones and tens). 25 + 47 Step 2: Add the digits in the ones column first. 5 (from 25) + 7 (from 47) = 12. Step 3: Since 12 is a two-digit number, we separate it into 10 and 2. We write down the 2 in the ones place of the answer and carry over the 1 (which stands for 10) to the tens column. Step 4: Now add the digits in the tens column, including the carry-over. 2 (from 25) + 4 (from 47) + 1 (carried over) = 7. Step 5: Write the 7 in the tens place of the answer. Step 6: Combine the tens and ones digits: 7 tens and 2 ones gives 72. Therefore, 25 + 47 = 72.

4. Sophia has 1 quarter, 1 dime, 1 nickel, and 1 penny. Noah has 2 dimes, 2 nickels, and 6 pennies. Draw a picture in your mind of each set of coins. Who has more money, and how much more? Answer: Sophia has 1 cent more than Noah Solution: Find how much Sophia has. Sophia has 1 quarter = 25 cents. Sophia has 1 dime = 10 cents.
   Full step-by-step solution

   Step 1: Find how much Sophia has. Sophia has 1 quarter = 25 cents. Sophia has 1 dime = 10 cents. Sophia has 1 nickel = 5 cents. Sophia has 1 penny = 1 cent. Total for Sophia = 25 + 10 + 5 + 1 = 41 cents. Step 2: Find how much Noah has. Noah has 2 dimes. 2 dimes = 10 + 10 = 20 cents. Noah has 2 nickels. 2 nickels = 5 + 5 = 10 cents. Noah has 6 pennies. 6 pennies = 1 + 1 + 1 + 1 + 1 + 1 = 6 cents. Total for Noah = 20 + 10 + 6 = 36 cents. Step 3: Compare. 41 cents is more than 36 cents. 41 - 36 = 5 cents. Sophia has 5 cents more than Noah.

5. A rectangular classroom has 8 rows of desks with 6 desks in each row. How many desks are there in total? Answer: 48 Solution: There are 8 rows of desks Each row has 6 desks To find the total, multiply the number of rows by the number of desks in each row: 8 × 6 8 × 6 = 48 The answer is 48 desks.
   Full step-by-step solution

   Step 1: There are 8 rows of desks Step 2: Each row has 6 desks Step 3: To find the total, multiply the number of rows by the number of desks in each row: 8 × 6 Step 4: 8 × 6 = 48 The answer is 48 desks.

6. 1 quarter + 1 dime + 1 nickel + 5 pennies = ? Answer: 45¢ Solution: Find the value of the quarter: 1 quarter = 25¢. Add the dime: 25¢ + 10¢ = 35¢. Add the nickel: 35¢ + 5¢ = 40¢.
   Full step-by-step solution

   Step 1: Find the value of the quarter: 1 quarter = 25¢. Step 2: Add the dime: 25¢ + 10¢ = 35¢. Step 3: Add the nickel: 35¢ + 5¢ = 40¢. Step 4: Add the pennies: 40¢ + 5¢ = 45¢. The answer is 45¢.

7. Emma has 2 quarters and 3 dimes in her hand. Olivia has 1 quarter and 5 nickels on the table. Look at the coins each girl has. Who has more money? How much more? Answer: Emma has 5¢ more Solution: Find how much Emma has. She has 2 quarters and 3 dimes. Each quarter is 25¢, so 2 quarters is 25¢ + 25¢ = 50¢.
   Full step-by-step solution

   Step 1: Find how much Emma has. She has 2 quarters and 3 dimes. Each quarter is 25¢, so 2 quarters is 25¢ + 25¢ = 50¢. Each dime is 10¢, so 3 dimes is 10¢ + 10¢ + 10¢ = 30¢. Add them: 50¢ + 30¢ = 80¢. Emma has 80¢. Step 2: Find how much Olivia has. She has 1 quarter and 5 nickels. One quarter is 25¢. Each nickel is 5¢, so 5 nickels is 5¢ + 5¢ + 5¢ + 5¢ + 5¢ = 25¢. Add them: 25¢ + 25¢ = 50¢. Olivia has 50¢. Step 3: Compare the totals. Emma has 80¢ and Olivia has 50¢. Emma has more. Subtract to find how much more: 80¢ − 50¢ = 30¢. The answer is Emma has 30¢ more.