Rounding is just making a number simpler by removing some digits. Think of it like estimating!
Instead of saying "I have $27.83 in my wallet," you might say "I have about $28." That's rounding!
Is the number 5 or bigger?
👉 Round UP ⬆️
Is the number smaller than 5?
👉 Round DOWN ⬇️
That's it! Seriously, that's the whole thing.
Step 1: What number is 27 between?
→ It's between 20 and 30
Step 2: Look at the last digit (the 7)
→ Is 7 ≥ 5? YES!
Step 3: Round UP!
Answer: 30
Step 1: What number is 42 between?
→ It's between 40 and 50
Step 2: Look at the last digit (the 2)
→ Is 2 ≥ 5? NO!
Step 3: Round DOWN!
Answer: 40
Step 1: Is it closer to $3 or $4?
→ Let's look at the cents: 67¢
Step 2: Is 67 ≥ 50?
→ YES! (6 is bigger than 5)
Step 3: Round UP!
Answer: $4
Imagine numbers on a line. The middle point is 5. Numbers closer to the right go UP, numbers closer to the left stay DOWN.
$19.99 → "About $20"
$7.25 → "About $7"
$52.80 → "About $53"
2:47 PM → "About 3 o'clock"
47 minutes → "About 50 minutes"
1 hour 52 min → "About 2 hours"
3.7 feet → "About 4 feet"
12.3 inches → "About 12 inches"
5.8 meters → "About 6 meters"
47 people → "About 50 people"
123 items → "About 120 items"
567 students → "About 570 students"
Round each number to the nearest ten:
38
Last digit: 8
Answer: 40
52
Last digit: 2
Answer: 50
85
Last digit: 5
Answer: 90
71
Last digit: 1
Answer: 70
5 or more?
Round UP
Less than 5?
Round DOWN
That's ALL!
Really, that's it!