Desmos Scientific Calculator: Using the Previous Answer Function

This lesson demonstrates how to use the previous answer function on the Desmos scientific calculator to efficiently evaluate expressions that build on previous entries. The tutorial walks through several expressions, showing how to use the answer key to simplify calculations. It covers basic operations, exponentiation, division, and square roots, culminating in verifying results by re-entering expressions.

What is the main purpose of the previous answer function on the Desmos scientific calculator?

• To save time by reusing previous calculations

• To store multiple expressions

• To graph equations

• To solve algebraic equations

How is the second expression evaluated using the previous answer function?

• By adding two squared to the previous result

• By multiplying the previous result by two

• By dividing the previous result by two

• By subtracting two squared from the previous result

What operation is performed on the previous result to evaluate the third expression?

• Multiplication

• Division

• Subtraction

• Addition

How is the third expression converted into a fraction?

• By clicking the fraction key

• By using the square root key

• By manually entering the fraction

• By clicking the circle on the right

What is added to the third expression to evaluate the fourth expression?

• The square root of 25

• The square root of 36

• The square root of 49

• The square root of 64

Which key is used to add the square root of 49 in the fourth expression?

• The exponent key

• The fraction key

• The square root key

• The a squared key

What operation is performed on the fourth expression to evaluate the fifth expression?

• It is doubled

• It is halved

• It is cubed

• It is squared

How is the fifth expression verified?

• By using a graphing tool

• By entering it as given and comparing results

• By using a different calculator

• By recalculating it manually

What is the decimal result of the fifth expression?

• 778.688

• 679.588

• 880.788

• 990.888

What is the fraction form of the fifth expression?

• 66,336 over 125

• 88,336 over 125

• 97,336 over 125

• 77,336 over 125