Number Sentence
Number Sentence
An equation is a mathematical statement, in symbols, that
two things are the same (or equivalent). Equations are written
with an equal sign, as in 2 + 3 = 5
An inequality is a statement about the relative size or order of
two objects. Could be greater than or less than
Example: 4 x 4 < 20
This inequality says 4 times 4 is less than < 20
Equation and inequality are number sentence
Example: 2 + 3 = 5 4 x 4 < 20 These are all number
sentence.
Some number sentence will ask you to find missing
numbers
12 + ? > 30 what is the missing number
A. 13 B. 15 C. 20
the missing number in this number sentence is - c. 20
Number sentence can be true or not true
Example: 4 + 6 = 8 This number sentence is not true,
because 4 plus 6 equal 10 not 8
Number sentence can be greater than or less than
< (less than sign) > (greater than sign)
other operation symbols in number sentence
≠ not equal to
≥ is greater than or equal to
≤ is less than or equal to
Typical number sentence homework.
If John has three apples. He gives two apples to Jane. Write
a number sentence for this problem. Answer: 3 - 2 = 1
Jenny has 7 marbles and Kenny has 5. How many do they
have together? Write a number sentence for this problem.
Answer: 7 + 5 = 12
What number is missing to make this number sentence true
237 < 2 __ 8
A O C2 D3 B1
Answer is D3 238