Lesson 2.4: Variables and Equations
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Define equation. | A mathematic statement that contains an equal sign.
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| Define open sentence. | An equation that contains a variable(s).
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| Name the three types of equations. | Equations are either true, false, or open.
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| How do you check a solution? | A number is a solution of an equation if the number makes the equation true.
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| What does the word "is" mean in equations? | The word "is" means equal to.
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| Give an example of an open sentence. (Open equation) | Twenty minus x is three
20-x=3
Open
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| Give an example of a true equation. | 3 plus 5 is 8
3+5=8
True
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| Give an example of a false equation. | Nine times the opposite of five is forty-five
9(-5)=45
False
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| Tell whether this equation is true, false, or an open sentence. | Seven less than the product of three and a number is equal to 4
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3x-7=4
Open
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| State and complete an equation and tell whether it is true, false, or an open sentence. | -6k+8=3
-6(-4)+8=3
24+8=3
32=3
False
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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