Cogito
Grade 2 Math · Chapter 3 · Lesson 8
Using Greater Than and Less Than
Write your comparison with a symbol.
10 problems · about 12 minutes · 2.NBT.A.4
What this lesson teaches
The child records comparisons of three-digit numbers using the symbols for greater than, less than, and equal to.
- > means greater than, < means less than, = means equal to.
- Compare the numbers first, then pick the symbol.
- Read the whole sentence to check it.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
3 problemsReview — Comparing Three-Digit Numbers: Which is greater, 548 or 584?
Answer 584
Why 8 tens beats 4 tens.
Review — What Zero Means: 7 hundreds, 0 tens and 2 ones is which number?
Answer 702
Why It is 702.
Review — Three Ways to Write a Number: 400 + 70 + 5 in digits?
Answer 475
Why 400 + 70 + 5 = 475.
Warm Up
Straightforward practice. Get the method working first.
3 problemsWhich symbol makes this true: 415 ? 451
Answer <
Why 415 is less than 451.
Which is the smallest: 620, 602, or 260?
Answer 260
Why 260 has the fewest hundreds.
Which symbol makes this true: 289 ? 305
Answer <
Why 2 hundreds against 3 hundreds.
Build It Up
The same ideas with more to keep track of.
1 problemWhich symbol makes this true: 736 ? 729
Answer >
Why The hundreds tie. Compare the tens.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
3 problemsWhich is largest: 390, 309, or 399?
Answer 399
Why Compare tens, then ones.
Making It True: Which symbol makes this true: 640 ? 640
Answer =
Why 640 is equal to 640.
Putting Them in Order: Which is the smallest: 512, 481, or 508?
Answer 481
Why 481 has only 4 hundreds.