Complete the Addition Sentence - Sums up to 10
🕵️♂️ Missing number alert! One of the numbers in our addition sentence has vanished. Use your math skills to find it!
Do this: Read the concept below, then try the quiz or activity.
Concept
Sometimes an addition problem is a puzzle where the answer is known, but one of the parts is missing.
🎯 Finding the Missing Part: Example: 4 + ___ = 9 1. Count On Strategy: Start at 4 and count on until you hear yourself say 9. "5, 6, 7, 8, 9". How many fingers did you put up? 5! 2. Subtraction Strategy: You can use subtraction to solve missing parts! Since 4 + something = 9, you can ask "What is 9 - 4?". The answer is 5.
Example: ___ + 2 = 7 Use the count on strategy starting from 2, or just think "7 - 2 = 5". The missing number is 5!
Try it
Find the missing numbers!
Instructions: Figure out what number makes the sentence true.
Problem 1: 3 + ___ = 8 * (Start at 3, count up to 8...) * Answer: ___
Problem 2: ___ + 5 = 10 * Answer: ___
Problem 3: 6 + ___ = 7 * Answer: ___
Problem 4: ___ + 4 = 4 * Answer: ___