Exponents
When multiplying a number by 105, how is the decimal point moved?
What is 5 places to the right?
34 x 31 =
What is 1,054?
What is the missing number in the sequence:
3.083, 3.093, ________, 3.113
What is the pattern moving left to right?
What is 3.103?
Increases by 0.01 (one hundredth) as you move left to right.
Nick and his class set a goal of reading 8,000 pages in 18 weeks. The first week they read 398 pages. Nick says, "since 400 x 20 = 8,000, we will reach our goal if we read 398 pages each week for 18 weeks." Do you agree with Nick? Explain.
No, Nick replaced both factors with higher numbers so his estimate is an overestimate. The actual number of pages will be less than his estimate of 8,000.
7.43 x 103 =
What is 7,430?
487 x 15 =
What is 7,305?
Sandra is 56.43 inches tall. On her fifth birthday, she was 43.27 inches tall. Write and solve an equation to show how much Sandra has grown since her fifth birthday.
What is 56.43 - 43.27 = 13.16 inches?
The best estimate for 173.3 + 78.4
A. 270
B. 220
C. 240
D. 250
What is D. 250?
What power of 10 makes the statement true?
7 x 10[] = 70,000
What is 4?
7 x 104 = 70,000
An auditorium has 29 rows of chairs with 115 chairs in each row. How many chairs does the auditorium have in all?
What is 3,335 chairs?
Seth has some boards that are each 0.24 meters long. He places 6 of the boards end-to-end. What is the total length of the boards?
What is 1.44 meters?
Find two numbers that round to 83.6 when rounded to the nearest tenth:
83.05 83.548 83.609
83.65 83.58 83.2
What are:
83.609 and 83.58?
(5 x 104) + (3 x 101) + (8 x 1/100)
What is 5,003.08
A farmer has 2 fruit stands. Each fruit stand has 24 crates of plums ready to sell. If there are 208 plums in a crate, how many plums does the farmer have to sell all together?
What is 9,984 plums?
Mora ate 8.5 containers of yogurt one week. Each container held 5.4 ounces of yogurt. How many ounces of yogurt did she eat in all?
What is 45.9 ounces?
A department store sells 152 pairs of jeans for $29 each. Which is the best estimate of the total sales for the jeans?
$3,000 $3,500 $4,000 $4,500
What is $4,500?
What number (in standard form) is equivalent to 100?
What is 1?
Alyssa buys 23 boxes of toothpicks for a school project. There are 255 toothpicks in each box. What is the total number of toothpicks, t, in all of the boxes?
Write and solve an equation using the variable, t.
What is:
t = 23 x 255;
t = 5,865 toothpicks
Trina lives 4.2 miles from her school. Richard lives 0.75 times this distance from the school. How far from the school does Richard live?
What is 3.15 miles?
Round 45.523 to the nearest whole number.
What is 46?