**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