1.
Which of these symbols is used to represent addition?
Correct Answer
A. +
Explanation
The symbol "+" is used to represent addition. It is commonly used in mathematics to indicate the operation of adding two or more numbers together. The horizontal line in the symbol represents the concept of combining or joining quantities, making it the appropriate symbol for addition.
2.
What are some other words for addition? (Select all that apply)
Correct Answer(s)
A. Plus
C. Total
E. Increase
Explanation
The correct answer options for words that mean addition are "plus," "total," and "increase." "Plus" is a commonly used term to indicate addition, such as in mathematical operations. "Total" refers to the sum or the whole amount when adding numbers together. "Increase" is another word for addition, as it implies adding more or making something larger. "Decrease" and "dividend" are not synonyms for addition; "decrease" means subtraction or reducing, while "dividend" refers to the result of division.
3.
Addition means to put one group of items together with other items and then counting to see how many items there are all together. True of False?
Correct Answer
A. True
Explanation
Addition is the mathematical operation of combining two or more groups of items to find the total number of items. It involves counting the items together to determine the sum. Therefore, the statement "Addition means to put one group of items together with other items and then counting to see how many items there are all together" is true.
4.
3 + 9 =
Correct Answer
12
5.
What is the first step to solving an addition question?
Correct Answer
C. Rewrite the question, lining up the digits from the right.
Explanation
The first step to solving an addition question is to rewrite the question, lining up the digits from the right. This allows for easier addition by ensuring that each place value is properly aligned. By lining up the digits, it becomes simpler to add the corresponding digits in each place value, starting from the right and moving towards the left.
6.
Without a calculator, add the folowing numbers together:56 + 39 =
Correct Answer
95
Explanation
The correct answer is 95 because when you add 56 and 39 together, you get a sum of 95.
7.
Without a calculator, add the folowing numbers together:725 + 6793 =
Correct Answer
7518
Explanation
To add the numbers 725 and 6793 together, you start by adding the digits in the ones place, which gives you 5. Then, you add the digits in the tens place, which gives you 2. Next, you add the digits in the hundreds place, which gives you 7. Finally, you add the digits in the thousands place, which gives you 1. Therefore, the sum of 725 and 6793 is 7518.
8.
Without a calculator, add the folowing numbers together:80536 + 4596 =
Correct Answer
85132
Explanation
To add these numbers together, start by adding the ones column, which gives us 6. Then move to the tens column, which gives us 9+9=18. Write down the 8 and carry over the 1 to the hundreds column. In the hundreds column, we have 3+5+1=9. Finally, in the thousands column, we have 8+4=12. Write down the 2 and carry over the 1 to the ten thousands column. In the ten thousands column, we have 1+0+8=9. Therefore, the sum of 80536 and 4596 is 85132.
9.
Without a calculator, add the folowing numbers together:109284 + 35673 =
Correct Answer
144957
Explanation
The given question asks to add two numbers together, 109284 and 35673. Without using a calculator, we can manually add these two numbers. Adding the units place, we get 3 + 4 = 7. Adding the tens place, we get 8 + 7 = 15. Carry over the 1 to the hundreds place. Adding the hundreds place, we get 2 + 6 + 1 = 9. Adding the thousands place, we get 0 + 3 = 3. Finally, adding the ten thousands place, we get 1 + 5 = 6. Therefore, the sum of 109284 and 35673 is 144957.
10.
Without a calculator, add the folowing numbers together:9144957 + 85123 =
Correct Answer
9230080
Explanation
To add the given numbers together, we can start by adding the digits in the ones place, which gives us 7 + 3 = 10. Since 10 is a two-digit number, we carry over the 1 to the tens place. Then, we add the digits in the tens place, which gives us 5 + 2 + 1 = 8. Finally, we add the digits in the hundreds, thousands, and ten thousands place, which are all 0. Therefore, the sum of 9144957 and 85123 is 9230080.