Name that Inverse
What is the inverse of adding 7?
Subtracting 7
If x=5, what is the answer to x+3?
5+3=8
Solve: x+5=12
x=7
The equation: x+4=10. Step: Subtract 4 from the 10, which gives you x=6. Is this correct?
Yes, Subtracting 4 takes away from 10, so x=6.
Solve: x/2=6
x=12
What is the inverse of multiplying by 3?
Dividing by 3
If x=4, what is the answer to 3x?
3×4=12
Solve: 3x=15
x=5
The equation: 3x=12. Step: Divide by 3 which gives you x=4. Is this correct?
Yes, dividing by 3 gives x=4.
Solve: x/5=3
x=15
To solve the equation x−9=4, what inverse operation would you use?
Add 9
If x=10, what is the answer to x/2?
10÷2=5
Solve: x/4=6
x=24
The equation: x−5=8. Step: Add 5 to 8 which gives you x=3. Is this correct?
No, the correct step is to add 5, because 8+5=13, so x=13.
Solve: x/4=8
x=32
What is the inverse of dividing by 5?
Multiplying by 5
If x=6and y=3 what is the answer of x×y?
6×3=18
Solve: x−9=3
x=12
The equation: x/2=7. Step: Multiply the 7 by 2, which gives you x=14. Is this correct?
Yes, multiplying by 2 gives you the x, so x=14.
Solve: x/10=7
x=70
To solve the equation 4x=12, what inverse operation would you use?
Divide by 3
If x=20, what is the answer to x/5?
20/5=5
Solve: 3x=9
x=3
The equation is:5x=35. Step: Divide the 35 by 5, which gives you x=7. Is this correct?
Yes, dividing the 35 by 5 gives you the x, so x=7.
Solve: x/7=8
x=56