Merlins Cave Problem
Subtraction Unknown Addends- 1st Grade
Watch first
Here are objects that are found inside Merlin’s cave. Be safe as you move around inside the 360 VR tour. Go below to fix Number One’s mistake.
A
If the answer is “A“ find the number on or around this object.
B
If the answer is “B“ find the number on or around this object.
C
If the answer is “C“ find the number on or around this object.
D
If the answer is “D“ find the number on or around this object.
Start!
You may want a piece of paper to solve problems.
Question #1
To solve 10 – 2 = _
we can also write 2 + _ = 10
A) 8 B) 9
C) 7 D) 10
A) Dragon
B) Book Stand
C) Metal Shape
D) Magic Staff
Question #2
To solve 8 – 2 = _
we can also write 2 + _ = 8
A) 5 B) 7
C) 6 D) 8
A) Large Vase
B) Mini Table
C) Telescope
D) Astronomy Tool
Type the numbers from the objects to get your first clue. Write the clues down as you will need all of them to unlock the master lock.
Clue Box
Question #3
To solve 10 – 5 = _
we can also write 5 + _ = 10
A) 5 B) 7
C) 8 D) 9
A) Spell Book
B) Magic Staff
C) Hourglass
D) Dragon
Question #4
To solve 12 – 2 = _
we can also write 2 + __= 12
A) 2 B) 10
C) 11 D) 8
A) Fire Vase
B) Metal Shape
C) Large Vase
D) Hourglass
Type in the numbers to get your clue.
Clue Box
Question #5
To solve 8 – 5 = _
we can also write 5 + _ = 8
A) 5 B) 3
C) 8 D) 6
A) Hourglass
B) Astronomy Tool
C) Star Rock
D) Spell Book
Type in the numbers to get your clue.
Clue Box
Input all the clues to help Merlin fix the mess.
MASTER LOCK
Did you fix the dragon problem?
Share your results with your teacher and parents. Tell them what the Master Lock was and where the key was found.