.easy math

name some situations in which you might use mental math.

2) tell how to write each of the following phrases as a numerical or algebraic expression: 75 less than 1023; the product of 125 and z

3)Definition of an equation

4)define addition equation

5) describe how you know what number to add on both sides of an equation containing subtraction

5) addition equations and subtracting equations differences and similarities

thanks... just wanted to check my answer

Question

.easy math

name some situations in which you might use mental math.

2) tell how to write each of the following phrases as a numerical or algebraic expression: 75 less than 1023; the product of 125 and z

3)Definition of an equation

4)define addition equation

5) describe how you know what number to add on both sides of an equation containing subtraction

5) addition equations and subtracting equations differences and similarities

thanks... just wanted to check my answer

anonymous · Answer

google doesn't work so I just wanted to check my answer

anonymous · Answer

To multiply an even number by 5,  divide the number mentally by 2 ( which can always be done mentally ) then just add a zero to  the result.

Ex:

468  5 =  2340

846486/5 = 4232430

etc.