Unit 2: Addition and Subtraction Review

Front

What is the sum of two numbers?

Back

The sum is the result of adding two or more numbers together.

Front

How do you find the difference between two numbers?

Back

To find the difference, subtract the smaller number from the larger number.

Front

What is an estimate in addition?

Back

An estimate is a rough calculation of the total, often rounded to the nearest ten or hundred.

Front

If Sofia earns 8 tickets each day for 7 days, how many tickets does she earn in total?

Back

Sofia earns a total of 8 tickets/day * 7 days = 56 tickets.

Front

What is the pattern of tickets earned by Sofia if she starts with 10 tickets and earns 8 tickets each day?

Back

The pattern is 10, 18, 26, 34, which shows the total tickets at the end of each day.

Front

How do you calculate the total received over multiple days?

Back

Add the amounts received each day to find the total.

Front

What is the best way to estimate the sum of 678 and 124?

Back

Round 678 to 700 and 124 to 100, then add: 700 + 100 = 800.

Front

What is the age difference if Jennifer is 19 and Steven is 23?

Back

The age difference is 4 years, as Steven is 4 years older than Jennifer.

Front

How do you solve for the total number of items received over a week?

Back

Add the number of items received each day to find the total for the week.

Front

What is the process for finding the difference between two numbers like 954 and 379?

Back

Subtract 379 from 954 to find the difference: 954 - 379 = 575.