Vocabulary
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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sum | the result of adding numbers
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estimate | to find about how much or how many
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front-end estimation | a method of estimating in which only the front digits are used
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expression | the part of a number sentence that combines numbers and operation signs
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not equal to ≠ | a relation symbol used to show that two numbers are not equal to each other
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subtract | to find the difference between two quantities
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regrouping | exchanging amounts of equal value to rename a number
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rounding | a method of estimating by substituting a number that is close
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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.
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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Central 3 Math
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