All of the Following Could Be Examples of Invented Strategies

question 18

Multiple Choice

All of the following could be examples of invented strategies for obtaining the sum of two-digit numbers EXCEPT:

• A)Adding on tens and then ones (For example,to solve 24 + 35,think 24 + 30 = 54 and 5 more makes 59.)
• B)Using nicer numbers to estimate (For example,to solve 24 + 47,think 24 is close to 25 and 47 is closer to 45 so 24 + 47 = 25 + 45 = 70.)
• C)Moving some to make 10 (For example,to solve 24 + 35,move 6 from 35 to make 24 + 6 and then add 30 to the remaining 29.)
• D)Adding tens and adding ones then combining (For example,to solve 24 + 35,think 20 + 30 = 50 and 4 + 5 = 9 so 50 + 9 = 59.)

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Definitions:

Foregone

Something missed or given up, often used in the context of opportunities or profits that were not realized.

Prime Rate

The interest rate that commercial banks charge their most credit-worthy customers, often used as a reference rate for various loans.

Revolving Credit

A credit facility that allows a company or individual to borrow up to a pre-approved limit, pay it back, and borrow again.

Commitment Fee

A fee charged by a lender to a borrower for an unused credit line or undisbursed loan.