Unknown Numbers
3X_=12
4
What fraction is shown at the third mark on a number line divided into 4 equal parts between 0 and 1?
3/4
What is the area of a rectangle that is 3 units wide and 4 units long?
12 square units
I have 4 boxes. Each box has 6 crayons. Then I gave away 5 crayons. How many do I have left?
4×6 = 24 – 5 = 19 crayons
How many sides does a quadrilateral have?
4
___/4=6
24
Which of these is equal to 1/2: 2/4, 3/6, or 4/8?
All of them
What is the perimeter of a rectangle with sides 5 and 6?
22 Units
Sarah baked 3 trays of cookies with 8 cookies on each tray. Then she baked 12 more. How many cookies did she bake in total?
3×8 = 24 + 12 = 36 cookies
What is a square? Is it also a rectangle?
A square has 4 equal sides and 4 right angles; yes, it is also a rectangle
5X ____=30/2
3
Which is bigger: 3/4 or 2/3? Use a number line to explain.
3/4 is bigger
A rectangle has an area of 24. One side is 4. What is the other side?
6
A classroom has 24 students. They sit in groups of 4. Then 2 groups leave for music class. How many students are left in the room?
2 groups = 8 students left → 24 – 8 = 16 students
Which quadrilaterals have all sides the same length?
Square and rhombus
___/3=4X2
24
Show 5/6 on a number line divided into sixths. What fraction is 1/6 less than 5/6?
4/6
Which shape has a greater area: a 5x5 square or a 6x4 rectangle?
5x5 is greater
I buy 3 packs of pencils. Each pack has 10 pencils. I give 2 pencils to each of 5 friends. How many pencils do I have left?
3×10 = 30 → 2×5 = 10 → 30 – 10 = 20 pencils
368 + 547 = ?
915
42=___X6+6
6
Draw a number line from 0 to 2. Mark 1/2, 3/4, 5/4, and 7/4. Which two are equivalent?
2/4 and 1/2
A shape has an area of 36 and one side is 9. What is the perimeter if it's a rectangle?
Other side is 4 → Perimeter = 9+9+4+4 = 26 units
There are 7 shelves. Each shelf holds 9 books. Then 18 books were removed. How many books are on the shelves now?
7×9 = 63 – 18 = 45 books
905 – 478 = ?
427