Hacktifier
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Game Info for Teachers
COMBINED RATING
TEACHERS (9)
STUDENTS (1945)
LENGTH
10 Minutes
GRADES
CAPABILITIES
Description
A villain has trapped an innocent mathling and wants to blame him for the crimes he didn't commit. Trapped in the villains hideout, the mathling must crack the code to open up the locked doors before the villain catches up to him. Tap the correct number to solve the broken equation. In this game by Zapzapmath, students will solve broken equations by finding the unknown number.
Vocabulary Words
Instructions
Play through this interactive game to learn about Subtraction as an Unknown Addend Problem. Suitable for Grade 1.
Main Concepts
Discussion Questions
Before the Game
Can you use addition to help you get the answer to a subtraction problem?
Have you ever heard of inverse operations?
Can you use subtraction to help you find the answer to an addition problem?
If ?-20=10, could we use 10+20=? to help you get the answer?
After the Game
Can you rewrite this subtraction problem, ?-5=10 as an addition problem?
How are addition and subtraction related?
Can you write out the fact family for these numbers 4 5 and 9?
If you don't know the answer to ?-3=5, what addition fact could you use to help you find the answer?