Rounding and Place Value
Round 4,376 to the nearest ten
4,380
4,325 + 1,478 = ?
5,803
Find the factor pairs of 12
(1,12), (2,6), (3,4)
If one pencil costs 12¢, how much do 8 pencils cost?
12¢ × 8 = 96¢
How many minutes are in 2 hours and 15 minutes?
135 minutes
Round 58,243 to the nearest hundred
58,200
9,004 − 3,678 = ?
5,326
List all multiples of 7 up to 70.
7, 14, 21, 28, 35, 42, 49, 56, 63, 70
A baker makes 4 trays of cookies. Each tray has 36 cookies. How many cookies total?
4 × 36 = 144 cookies
Convert 3 meters to centimeters.
300 cm
Round 7,495 to the nearest thousand.
7,000
A class collected 2,456 cans one week and 1,789 cans the next. How many cans in all?
4,245
Is 29 prime or composite? Explain with its factor pairs.
29 is prime (only factors 1 and 29)
Sara had 4,512 stickers. She gave 1,234 to friends and then divided the rest equally among 7 classmates. How many stickers did each classmate receive? (Give quotient and remainder if any.)
4,512 − 1,234 = 3,278; 3,278 ÷ 7 = 468 R 2 (each gets 468, 2 left over)
Draw (or describe) an angle that is acute and one that is obtuse. Which is greater than 90°?
Acute: any angle less than 90° (e.g., 45°). Obtuse: any angle greater than 90° and less than 180° (e.g., 120°). Obtuse is greater than 90°.
What digit do you look at to round the number 32,781 to the nearest thousand, and why?
Look at the hundreds digit (7 in 32,781) because you round thousands by checking the hundreds place; since 7 ≥ 5, round up: 33,000
Solve: 12,405 + 7,698 − 5,212 = ?
14,891
Find all factor pairs of 48
(1,48), (2,24), (3,16), (4,12), (6,8)
A truck delivered 3 boxes with 246 apples each and 2 boxes with 198 apples each. How many apples were delivered total?
3×246 = 738; 2×198 = 396; 738+396 = 1,134 apples
calculate: If an angle is 120°, how many degrees of the angle would need to be removed to make a right angle?
120 - 90 = 30
Explain and show how to round 246,849 to the nearest ten thousand. Write the rounded number.
Ten-thousands place is 4 (in 246,849). Look at thousands digit 6 (≥5) so round up: 250,000.
A school fundraiser raised $8,764. After expenses of $2,539 and another expense of $1,248, how much remains? Show your subtraction steps.
$4,977
Explain why 97 is prime and give the factor pairs for 100.
97 is prime (only 1 and 97). Factor pairs for 100: (1,100), (2,50), (4,25), (5,20), (10,10)
A field trip costs $18 per student. If 137 students go, and the bus fee is $245, what is the total cost? Show multiplication and addition steps.
137 × 18 = 2,466; 2,466 + 245 = $2,711
A circular wheel is divided into 12 equal sections. What is the degree measure of one section? Show your work.
One section = 360° ÷ 12 = 30°