Mixed Review 1
What number do you get when you round the number 20,554 to the nearest hundred?
20,600
What is the sum of 35,472 + 5496?
40,968
What is 26,964 + 17,258
44,222
Which estimation allows us to use the first digit of each factor in a calculation?
front-end estimation
Write the multiplication equation for the comparison.
810 is 9 times as many as 90.
810 = 9 x 90
There were 20 sheep that lived on Mr. Olson's Farm. Mrs. Stew had 8 times as many sheep. How many sheep were on Mrs. Stew's property?
160 sheep
What is the value of x in the equation 15 + 3 - x = 12
x = 6
What is 9873 - 4982?
4891
A number sentence with an equal sign that shows the value on the left side is the same as the value on the right side.
equation
Use front-end estimation to complete the statement.
7 x 32 becomes 7 x _____.
30
How do you write the whole number 73,492 in expanded form?
70,000 + 3,000 + 400 + 90 + 2
360,000
Solve the equation. 30,152 - 19,876
10,276
An approximate answer; to find an answer that is close the exact/actual answer.
estimation
3
What number do you get when you round the number 3,215,440 to the nearest hundred thousand?
3,200,000
What is the product of 3 and 42?
126
What is the value of x in the equation 80 - x = 45
x = 35
Which property of Multiplication states that the product of 1 and a number is the same as that number?
The Identity Property of Multiplication
What is 29 x 5?
145
When you write 30,000 + 2,000 + 80 + 9 in standard form, what number do you get?
32,089
What is the value of the 5 in the whole number 459,627?
50,000
I read 432 library books in February, but only 148 in March. What is the difference in the number of books I read?
284 books
Which property of Addition states that the changing the grouping of the addends does not change the sum?
The Associative Property of Addition
Find the product.
4 x (3+7)
40