NUMBER SENTENCE

Number Sentence

Definition Of Number Sentence

A Number Sentence represents an equation that includes numbers and operation symbols like addition, subtraction, multiplication, and division.

More About Number Sentence

A number sentence can also be represented by using inequality symbols like < ,="">.

Video Examples: Number Sentences

Examples of Number Sentence

If there are 5 candies and the cost of each candy is 12 cents, then the cost of 5 candies in the form of a number sentence is written as:
5 × 12 = 60, i.e. the cost of 5 candies = 60 cents.
The cost of 1 apple is $2 and the cost of 7 apples is $14. So, the number sentence that represents the situation is 7 × 2 = 14.

Solved Example on Number Sentence

Ques: Which of the given number sentences is true?

Choices:

A. 40 + 20 <>
B. 8 × 4 = 22
C. 40 - 20 = 18
D. 40 ÷ 8 = 15
Correct Answer: A

Solution:

Step 1: An inequality also represents a number sentence. So,
40 + 20 <>
60 < 80="" is="">
Step 2: 8 × 4 = 32 but the number sentence given 8 × 4 = 22 is not true.
Step 3: 40 - 20 = 20 but not 18 and hence the number sentence 40 - 20 = 18 is not true.
Step 4: 40 ÷ 8 = 5 but not 15 and hence the number sentence 40 ÷ 8 = 15 is also not true.
Step 5: Hence the number sentence 40 + 20 < 80="" is="" true.="">

Quick Summary

A number sentence uses numbers and symbols to show a mathematical relationship.
It can be an equation (using '=') or an inequality (using '<', '>', '≤', '≥').
Number sentences can be used to represent real-world situations.

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🍎 Teacher Insights

Encourage students to translate word problems into number sentences step-by-step. Emphasize the importance of accurate calculations and correct use of symbols.

🎓 Prerequisites

Basic arithmetic operations (addition, subtraction, multiplication, division)
Understanding of equality and inequality symbols

Check Your Knowledge

Q1: Which of the following is a true number sentence?

A. 5 + 3 = 7 B. 10 - 2 = 8 C. 4 × 2 = 6 D. 12 ÷ 3 = 5

Q2: Which number sentence represents 'The cost of 5 candies at 12 cents each is 60 cents'?

A. 5 + 12 = 60 B. 5 - 12 = 60 C. 5 × 12 = 60 D. 5 ÷ 12 = 60

Frequently Asked Questions

Q: What is the difference between a number sentence and a word problem?
A: A number sentence is the mathematical representation of a word problem. It uses numbers and symbols to express the relationship described in the word problem.

Q: Can a number sentence be false?
A: Yes, a number sentence can be false if the relationship it shows is not true. For example, 2 + 2 = 5 is a false number sentence.