SME
Grade 3 Math · Problem type
Two-step problems: subtract, then divide
Use this for “45 stickers, 5 given away, the rest shared on 8 pages. How many on each?”
Diagram
45 − 5 = 40 left.
40 ÷ 8 = 5 in each group.
Groups: 8
In each group: 5
This is an example. Type your own values to start a new problem.
(
Start
−
Given away
)
÷
Groups
=
In each group
Left
calculated
Formulas
45 − 5 = 40
Start − given away = left
8 × 5 = 40
Groups × in each group = left
Assumptions
•
First take away to find what is left. Then share what is left equally.
•
Every group gets the same number, with none left over.
Step-by-step
WE KNOW
Start: 45
Given away: 5
Groups: 8
FIND
left, in each group
Step 1 · Find left
45 − 5 = ?
Start − given away = left
Take the number given away from the start.
Left = 40
Step 2 · Find in each group
8 × ? = 40
Groups × in each group = left
Divide the number left by the groups.
In each group = 40 ÷ 8
Think: 8 × ? = 40
10 × 8 = 80. Five groups are half of that: 40
In each group = 5
Check
Put the numbers back in. Both sides should match.
45 − 5 = 40 ✓
8 × 5 = 40 ✓
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Two-step problems: multiply, then add
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Two-step problems: multiply, then compare
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