Test for class

Front

What is the process of rounding a number?

Back

Rounding a number involves adjusting it to the nearest specified place value (e.g., nearest ten, hundred) based on whether the digit in the next place value is 5 or greater (round up) or less than 5 (round down).

Front

What is the result of rounding 38 to the nearest ten?

Back

40

Front

How do you evaluate an expression with a variable?

Back

To evaluate an expression with a variable, substitute the variable with the given value and perform the arithmetic operations.

Front

What is the expression for 13r + 6 when r = -1?

Back

13(-1) + 6.

Front

What is the value of the expression 13r + 6 when r = -1?

Back

-7.

Front

What is the process of estimating a total in addition?

Back

Estimating a total involves rounding each number to a convenient value and then adding those rounded values together.

Front

What is the estimated total of 74 + 33?

Back

100.

Front

What is the nearest ten to the number 23?

Back

20.

Front

What is the difference between exact and estimated calculations?

Back

Exact calculations provide precise values, while estimated calculations provide approximate values for easier mental math.

Front

What is the significance of the digit in the place value when rounding?

Back

The digit in the place value immediately to the right of the rounding place determines whether to round up or down.