SME
Grade 2 Science · Problem type
Water or no water
Use this for “The watered plant is 22 cm, the dry one 8 cm. How much taller?”
Picture
Watered plant is 14 cm longer than Dry plant.
This is an example. Type the numbers from your problem to start.
Watered plant (cm)
−
Dry plant (cm)
=
Taller by (cm)
Number sentences
22 − 8 = 14
Good to know
•
Grow two plants the same way, except one gets water and one does not.
•
Give both the same light. Measure them after two weeks.
•
The difference shows what water does.
Step-by-step
WE KNOW
Watered plant: 22 cm
Dry plant: 8 cm
FIND
taller by
Step 1 · Find taller by
22 − 8 = ?
Count up from the dry plant’s height to the watered plant’s. That is how much taller.
8 + 2 = 10
10 + 10 = 20
20 + 2 = 22
Jumps: 2 + 10 + 2 = 14
Taller by: 14 cm
Check
Put the numbers back in. Both sides should match.
22 − 8 = 14 ✓
Topic check
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