Solution Word Form - Place Value in Grade 2

Master solution word form: converting numbers to words, solving word problems, and understanding place value concepts with these 10 detailed exercises and visual infographics.

Solution: Exercises 1 to 5
1 Number to Word
Exercise 1
Write the number 25 in word form.
Question: How do you say 25 in words?
Question Analysis:
We need to convert the numerical form 25 into its written word equivalent.
Definition:

Word form: Writing numbers using words instead of digits. For example, 25 becomes "twenty-five".

Method:
  1. Identify the place value of each digit (tens and ones)
  2. Write the tens part: 2 tens = twenty
  3. Write the ones part: 5 ones = five
  4. Combine with hyphen: twenty-five
2
TENS
5
ONES
Step 1: Identify place values

25 = 2 tens + 5 ones

Step 2: Convert tens

2 tens = twenty

Step 3: Convert ones

5 ones = five

Step 4: Combine

twenty-five

25 = twenty-five
Final answer:

The number 25 in word form is "twenty-five"

Applied rules:

• Hyphenation: Numbers from 21-99 (except multiples of 10) use hyphens

• Place value: Convert each place separately then combine

2 Word to Number
Exercise 2
Write "thirty-seven" in number form.
Question: What number does "thirty-seven" represent?
Question Analysis:
We need to convert the word form "thirty-seven" into its numerical equivalent.
Word
thirty-seven
Breakdown
thirty + seven
Number
37
Step 1: Break down the word

"thirty-seven" = "thirty" + "seven"

Step 2: Convert each part

"thirty" = 30, "seven" = 7

Step 3: Combine

30 + 7 = 37

thirty-seven = 37
Final answer:

"thirty-seven" in number form is 37

Applied rules:

• Compound numbers: Numbers like "thirty-seven" represent 30 + 7

• Place value understanding: Thirty means 3 tens

3 Word Problem
Exercise 3
Sarah has forty-two apples. She gives away twelve apples. How many apples does she have left? Write your answer in word form.
Question: What is the final number of apples in words?
Question Analysis:
We need to solve a subtraction problem and express the answer in word form.
Problem Solving Steps:

Starting amount: forty-two apples = 42

Apples given away: twelve apples = 12

Remaining: 42 - 12 = 30

30 in words = thirty

Step 1: Convert word numbers to digits

forty-two = 42, twelve = 12

Step 2: Solve the problem

42 - 12 = 30

Step 3: Convert answer back to words

30 = thirty

Answer: thirty
Final answer:

Sarah has thirty apples left

Applied rules:

• Word problem solving: Convert words to numbers, solve, then convert back

• Arithmetic operations: Perform calculations with numbers

Solution: Exercises 6 to 10
4 Larger Numbers
Exercise 4
Write the number 89 in word form.
Question: How do you say 89 in words?
Question Analysis:
We need to convert 89 into its written word equivalent following the same pattern as smaller numbers.
8
TENS
9
ONES
Number
89
Breakdown
80 + 9
Word form
eighty-nine
Step 1: Identify tens and ones

89 = 8 tens + 9 ones

Step 2: Convert tens

8 tens = eighty

Step 3: Convert ones

9 ones = nine

Step 4: Combine with hyphen

eighty-nine

89 = eighty-nine
Final answer:

The number 89 in word form is "eighty-nine"

Applied rules:

• Pattern consistency: Same process applies to all 2-digit numbers

• Hyphenation rule: Numbers 21-99 (except multiples of 10) use hyphens

5 Multi-step Word Problem
Exercise 5
Tom collected fifty-six marbles. His friend gave him twenty-four more marbles. Then he lost fifteen marbles. How many marbles does Tom have now? Write your answer in word form.
Question: What is the final number of marbles in words?
Question Analysis:
We need to perform multiple operations and express the final answer in word form.
Multi-step Solution:

Initial marbles: fifty-six = 56

Marbles received: twenty-four = 24

Total after receiving: 56 + 24 = 80

Marbles lost: fifteen = 15

Final count: 80 - 15 = 65

65 in words = sixty-five

Step 1: Convert all word numbers to digits

fifty-six = 56, twenty-four = 24, fifteen = 15

Step 2: Perform addition first

56 + 24 = 80

Step 3: Perform subtraction

80 - 15 = 65

Step 4: Convert final answer to words

65 = sixty-five

Answer: sixty-five
Final answer:

Tom has sixty-five marbles now

Applied rules:

• Order of operations: Addition before subtraction in this context

• Multi-step problem solving: Solve step by step

Solution Word Form Visual Guide
23
twenty-three
45
forty-five
67
sixty-seven
89
eighty-nine
25 = twenty-five
Number to Word Conversion
WORD FORM PATTERNS
📝
2
TENS DIGIT
twenty
→
5
ONES DIGIT
five
→
-
COMBINE WITH
hyphen
25 → twenty-five
Hyphenation Rules:

• Numbers 21-99: Use hyphens for compound numbers (except multiples of 10)

• Examples: twenty-one, thirty-five, forty-eight, ninety-nine

• Exception: Multiples of 10: twenty, thirty, forty, fifty...

Additional Exercises and Practice
Exercise 6
Question: Write "seventy-three" in number form.
Answer: 73
Exercise 7
Question: Write 58 in word form.
Answer: fifty-eight
Exercise 8
Question: There are thirty-one students in a class. Fifteen students are absent. How many students are present? Write your answer in word form.
Answer: sixteen
Exercise 9
Question: Write 94 in word form.
Answer: ninety-four
Exercise 10
Question: John has forty-seven books. He buys twelve more. How many books does he have now? Write your answer in word form.
Answer: fifty-nine
Key definitions:

Word form: Writing numbers using words instead of digits

Numerical form: Writing numbers using digits

Place value: The value of a digit based on its position in a number

Word Form Conversion Method:
  1. Identify place values: Recognize tens and ones in the number
  2. Convert tens digit: Change the tens digit to its word equivalent
  3. Convert ones digit: Change the ones digit to its word equivalent
  4. Combine with hyphen: Join the words with a hyphen for compound numbers
  5. Reverse process: For word to number, break down and convert each part
Tip 1: Remember hyphens for numbers 21-99 except multiples of 10.
Tip 2: Practice with flashcards showing numbers and their word forms.
Tip 3: Read word problems carefully and convert numbers as needed.
Essential Rules:

• Hyphenation: Use hyphens for compound numbers 21-99 (not multiples of 10)

• Pattern consistency: Same conversion process works for all 2-digit numbers

• Word problem strategy: Convert to numbers, solve, then convert back to words

Questions & Answers

Question: Why do we use hyphens in numbers like "twenty-one" but not in "thirty"? It seems inconsistent to me.

Answer: Great observation! The hyphen rule is consistent once you understand the reasoning:

  • Multiples of 10 (20, 30, 40, 50...) have their own unique names: twenty, thirty, forty, fifty
  • Compound numbers (21-29, 31-39, 41-49...) combine the tens and ones parts: twenty-one, thirty-one, forty-one
  • The hyphen connects the tens and ones parts to show they form one number

Think of it like compound words in English: "ice cream" vs "icecream" - the hyphen shows the connection between parts that work together.

So the rule is: all numbers 21-99 that aren't multiples of 10 get hyphens, while multiples of 10 keep their separate names.

Question: My child is having trouble with word problems that require converting numbers to words. How can I help them master this skill?

Answer: Here's a systematic approach to help your child:

  • Start with simple conversions: Practice converting numbers to words and vice versa without word problems first
  • Use visual aids: Show the connection with place value charts and base ten blocks
  • Break down word problems: Read the problem, identify key numbers, convert them, solve, then convert the answer back
  • Create real-world connections: Use everyday situations like counting money, measuring, or reading signs

Practice daily with 5-10 minutes of focused work. Use games and activities to make it engaging. Consistency is more important than intensity at this age.

Remember: patience and repetition are key for developing this foundational skill.

Question: Are there any tricks to help remember how to spell number words correctly?

Answer: Yes! Here are some helpful memory tricks:

  • Twelve is tricky: Remember "twelve" has an "e" like "eleven" - both end in "eve"
  • Forty vs Fifty: "Forty" has an "o" like "four", "Fifty" has an "i" like "five"
  • Teens pattern: Most end in "teen": thirteen, fourteen, fifteen, etc.
  • Consistent tens: twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety

Create a personal reference sheet with challenging spellings. Practice writing numbers in sentences: "I have twenty-five pencils."

Spelling games and apps designed for number words can also reinforce correct spelling through repetition.

Complete Summary: Solution Word Form
Definitions and Concepts

Word Form: Writing numbers using words instead of digits (e.g., "twenty-five" instead of 25).

Numerical Form: Writing numbers using digits (e.g., 25 instead of "twenty-five").

Place Value: The value of a digit based on its position in a number (tens, ones).

Core Rules and Laws

Hyphenation Rule: Compound numbers from 21-99 (except multiples of 10) use hyphens: twenty-one, thirty-five, forty-eight.

Pattern Consistency: The same conversion process works for all 2-digit numbers.

Place Value Recognition: Identify tens and ones positions before conversion.

Step-by-Step Methods
  1. Number to Word Conversion: Identify tens and ones, convert each part, combine with hyphen if needed
  2. Word to Number Conversion: Break down compound words, convert each part, combine numerically
  3. Word Problem Strategy: Read carefully, convert words to numbers, solve, convert answer back to words
Concrete Examples

Simple: 23 = twenty-three, 45 = forty-five

Advanced: 87 = eighty-seven, 94 = ninety-four

Word Problems: "Sarah has thirty-two apples" = 32 apples

Tips and Tricks

Memory Aid: Remember "twelve" has an "e" like "eleven".

Hyphen Reminder: Use hyphens for 21-99 except multiples of 10.

Practice Strategy: Daily practice with 5-10 minutes of focused work.

Common Pitfalls

Missing Hyphens: Forgetting hyphens in compound numbers.

Incorrect Spelling: Confusing "forty" and "fifty".

Place Value Errors: Misidentifying tens and ones positions.

Key Takeaways for Memorization

Pattern Recognition: All 2-digit numbers follow the same conversion pattern.

Hyphen Rule: 21-99 (except multiples of 10) need hyphens.

Practice Makes Perfect: Regular practice builds fluency and confidence.

Application in Real Context

Solution word form skills apply to reading story problems, writing checks, completing forms, and communicating mathematical ideas clearly. These skills form the foundation for more complex number work in higher grades.