Number Detectives
What is 3000+200+6 in standard form?
3,206
Which unit would you use to measure the length of a pencil: inches, feet, or yards?
Inches
Mia has 125 stickers. Her friend gives her 30 more. How many stickers does Mia have now?
125 + 30 = 155 stickers
There are 12 birds in a tree. The other tree has 5 more birds than the first tree. How many birds are there altogether?
29 birds
Complete the table using the rule “multiply by 2.” If the input is 3, what is the output?
6
Write 5,821 in expanded notation.
Which unit would you use to measure the distance between two cities: inches, feet, or miles?
Miles
A teacher has 48 pencils and gives 19 pencils to students. About how many pencils does she have left? Estimate by rounding to the nearest ten.
50 - 20 = 30 pencils
Complete the equation: 7 × ___ = 42.
6
A table shows 2 → 6, 3 → 9, and 4 → 12. What rule connects the input to the output?
Multiply by 3
Write 4,207 in word form
Four thousand, two hundred seven
Would you measure the amount of water in a bathtub in cups, gallons, or miles?
Gallons
There are 6 bags with 4 apples in each bag. How many apples are there altogether?
6x4=24 apples
Write an equation to represent this problem: Carlos has 24 marbles and shares them equally among 4 friends. How many marbles does each friend get?
24 ÷ 4 = 6
Draw or describe a strip diagram for this problem: There are 5 bags with 4 oranges in each bag. How many oranges are there altogether?
5x4=20
Put these numbers in order from LEAST to GREATEST: 3,456 / 3,546 / 3,465 / 3,654.
3,456 / 3,465 / 3,546 / 3,654
A classroom door is about 7 feet tall. Would inches, feet, or yards be the most appropriate unit to describe its height?
Feet
A school library has 245 fiction books and 178 nonfiction books. How many books does the library have altogether?
245 + 178 = 423 books
Lily has 3 times as many stickers as Ana. Ana has 7 stickers. Write an equation to find how many stickers Lily has.
3 × 7 = 21 stickers
Which table follows the rule “multiply the input by 4”? A: 1 → 4, 2 → 8, 3 → 12.
B: 1 → 4, 2 → 6, 3 → 8.
C: 1 → 5, 2 → 6, 3 → 7.
I am a four-digit number. My thousands digit is 5, my hundreds digit is 3, my tens digit is 7, and my ones digit is 2. What number am I?
5,372
You need to measure the length of a school hallway. Which unit would be most appropriate: inches, feet, or miles? Explain why.
Feet, because a hallway is measured in feet rather than inches or miles.
A school buys 6 boxes of markers with 8 markers in each box. The teacher gives 15 markers to another class. How many markers are left?
6x8=48 / 48-15=33 markers
A farmer puts 36 eggs equally into 4 cartons. Then he sells 5 eggs from one carton. Write an equation showing how many eggs remain in that carton if each carton initially has the same number of eggs.
36 ÷ 4 − 5 = 4 eggs
A toy store sells 3 toy cars for every 1 toy truck. Complete the table:
1 truck → ___ cars;
2 trucks → ___ cars;
4 trucks → ___ cars.
3 cars
6 cars
12 cars