SME
Grade 2 Science · Physical Science
Properties of materials
Use this for “Which soaks up more drops, the paper towel or the newspaper? How many more?”
Picture
24
6
Difference in drops: 18 drops
This is an example. Type the numbers from your problem to start.
Drops the paper towel soaks up
example · drops
Drops the newspaper soaks up
example · drops
Difference in drops
answer · drops
Number sentences
24 and 6 are 18 apart
Good to know
•
Test each material the same way: drop water on it one drop at a time.
•
Count the drops it soaks up before water runs off.
•
The material that soaks up more drops is better for wiping up.
Step-by-step
WE KNOW
Drops the paper towel soaks up: 24 drops
Drops the newspaper soaks up: 6 drops
FIND
difference in drops
Step 1 · Find difference in drops
24 and 6 are ? apart
Count up from the smaller number to the bigger one. That is how many more drops.
24 − 6
6 + 4 = 10
10 + 10 = 20
20 + 4 = 24
Jumps: 4 + 10 + 4 = 18
Difference in drops: 18 drops
Check
Put the numbers back in. Both sides should match.
24 − 6 = 18 ✓
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