2nd Grade DCA 2 Review

Front

What is the process to find the total when adding two numbers together?

Back

To find the total when adding two numbers, you simply combine the values of both numbers. For example, if you have 36 baseball cards and receive 29 more, you add 36 + 29 to get a total of 65.

Front

How do you solve a multi-step addition problem?

Back

To solve a multi-step addition problem, break it down into smaller parts. For example, in 5 + 6 + 4 + 4 + 1, you can add the first two numbers (5 + 6 = 11), then add the next number (11 + 4 = 15), and continue until all numbers are added to get a total of 20.

Front

What is the method to find an unknown quantity in a word problem?

Back

To find an unknown quantity in a word problem, identify the known values and the relationship between them. Set up an equation based on the information given. For example, if Mrs. Smith's class read 23 books and both classes read 59 books, you can find the unknown by subtracting: 59 - 23 = 36.

Front

How do you read time on an analog clock?

Back

To read time on an analog clock, observe the position of the hour and minute hands. The hour hand points to the hour, and the minute hand points to the minutes. For example, if the hour hand is on 10 and the minute hand is on 12, the time is 10:00.

Front

What is standard form in mathematics?

Back

Standard form is a way of writing numbers using digits. For example, the number 100 + 20 + 9 can be expressed in standard form as 129.

Front

What is the importance of understanding place value in addition?

Back

Understanding place value is crucial in addition because it helps you align numbers correctly based on their value (ones, tens, hundreds) when performing calculations.

Front

How can you check your addition for accuracy?

Back

You can check your addition by using the inverse operation (subtraction) to see if the sum matches the original numbers. For example, if you added 36 and 29 to get 65, you can check by subtracting 29 from 65 to see if you get 36.

Front

What strategies can be used to solve word problems?

Back

Strategies for solving word problems include reading the problem carefully, identifying key information, visualizing the problem, and writing an equation to represent the situation.

Front

What is a word problem in mathematics?

Back

A word problem is a mathematical question presented in a narrative form, requiring the reader to extract relevant information and perform calculations to find a solution.

Front

How do you break down a complex addition problem?

Back

To break down a complex addition problem, group numbers that are easy to add together, or use rounding to simplify the calculation before adding the exact numbers.