Comprehensive Guide to Hundreds, Tens, and Ones in Grade 2

Master place value: understanding how to identify hundreds, tens, and ones in numbers, decompose numbers into their place values, and develop number sense through detailed exercises and comprehensive summary.

Solution: Exercises 1 to 3
1 Place Value Identification
Exercise 1
How many hundreds, tens, and ones are in the number 742?
Definition:

Hundreds, tens, and ones: Place values that represent groups of 100, 10, and 1 respectively.

Place value identification method:
  1. Look at each digit in the number
  2. Identify the hundreds digit (third from right)
  3. Identify the tens digit (second from right)
  4. Identify the ones digit (rightmost)
  5. Count how many hundreds, tens, and ones are present
7
Hundreds Place
7 hundreds
4
Tens Place
4 tens
2
Ones Place
2 ones
7 hundreds = 700
4 tens = 40
2 ones = 2
700 + 40 + 2 = 742
Step 1: Identify the digits

742 has digits 7, 4, and 2

Step 2: Identify positions

7 is in the hundreds place, 4 is in the tens place, 2 is in the ones place

Step 3: Count each place value

7 hundreds, 4 tens, and 2 ones

Step 4: Verify

700 + 40 + 2 = 742 ✓

Final answer:

742 has 7 hundreds, 4 tens, and 2 ones.

Applied rules:

• Position rule: Rightmost digit is ones, middle is tens, leftmost is hundreds

• Value rule: Each position is 10 times the previous position

• Counting rule: Digit represents how many of each place value

2 Number Decomposition
Exercise 2
Break apart the number 583 into hundreds, tens, and ones.
Definition:

Decomposition: Breaking a number into its component place values.