SME
Grade 2 Math · Problem type
Two-step problems: add, then subtract
Use this for two-step problems: some come, then some go.
Picture
Start 25, add 18, then take away 9.
End 34.
After the first step: 43
This is an example. Type the numbers from your problem to start.
Start
example
Added first
example
After the first step
worked out
Taken away next
example
End
answer
Number sentences
43 = 25 + 18
34 = 43 − 9
Good to know
•
First some are added. Then some are taken away.
•
Do one step at a time. Find the middle amount first.
•
Every amount stays within 100.
Step-by-step
WE KNOW
Start: 25
Added first: 18
Taken away next: 9
FIND
after the first step, end
Step 1 · Find after the first step
? = 25 + 18
First: add to the start.
1
2
5
+
1
8
4
3
25 + 10 = 35
35 + 5 = 40
40 + 3 = 43
After the first step: 43
Step 2 · Find end
? = 43 − 9
Then: take away from the middle amount.
43 − 3 = 40
40 − 6 = 34
End: 34
Check
Put the numbers back in. Both sides should match.
43 = 25 + 18 ✓
34 = 43 − 9 ✓
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