Use ten to subtract
Subtracting from ten is a breeze! π¬οΈ Letβs use our friend Ten to solve tricky subtraction problems quickly and become subtraction wizards! π§ββοΈ
Do this: Read the concept below, then try the quiz or activity.
Concept
This strategy is the reverse of 'make ten to add'. To subtract, we can break the problem down by first subtracting from a ten. This makes the math feel much simpler.
Visual: Let's solve 14 - 6. 1. Think of 14 as one group of ten and 4 ones. (Imagine one full ten-frame and 4 extra counters). 2. First, take away the 4 ones to get down to a nice, round 10. You've subtracted 4 so far. 3. You need to subtract 6 in total. Since you already subtracted 4, you need to subtract 2 more (because 6 = 4 + 2). 4. Now, just do 10 - 2. That's 8! 5. So, 14 - 6 = 8.
Key Idea: When you have a teen number, first subtract the 'ones' part to get to 10. Then, subtract the rest from 10. It breaks a big step into two small, easy steps.
Try it
Practice: Use ten to subtract.