Operations with Decimals
Solve the following
0.1+0.6=?
0.9+2.35=
=0.7
= 3.25
What is 0.50 as a percentage?
50%
What do you do with the decimal place of a number when it is being multiplied by a power of 10?
Also provide an example
Move the decimal place to the right the amount of times that there are zeros in the power of 10
eg. for multiplying a number by 100 you move the decimal to the right 2 times as their are 2 zeros
2x+4x
6x
if x =5 and y =13 solve the following:
x+y=
18
Solve the following
10 - 5.5=
12.35 - 1.27=
= 4.5
= 11.08
2/10 as a decimal
0.2
What do you do with the decimal place of a number when it is being divided by a power of 10?
Also provide an example
Move the decimal place to the left the amount of times that there are zeros in the power of 10
eg. for dividing a number by 100 you move the decimal to the left 2 times as their are 2 zeros
Round 3.1456 to 2 decimal places
3.15
if x = 3 and y = 2 solve....
2x+5y
16
Solve the following
0.5 x 0.8
0.4
79/100 as a percentage?
79%
Multiply 15.34 by 100
1534
Simplify by collecting like terms 5a+10a-3b+5b
15a+2b
Write an expression for 5 more than x
5+x
30.5 / 5
6.1
7/20 as a decimal
0.35
Multiply 0.005 by 10000
50
Is this an equation or an expression?
8x-5y+20
Expression
Write an expression for the difference of x and y is multiplied by 5
5(x-y)
11.2 x 5.6
62.72
whats 5% of 130
6.5
Divide 270.36 by 1000
0.27936
for the expression 3x+2y+10 identify:
the #of terms:
the coefficient of x:
the coefficient of y:
the constant:
3
3
2
10
50-2xy+y2 if x=3 and y=2
47