SME
Grade 2 Math · Problem type
Two-step problems: add, then add
Use this for two-step problems where some come, twice.
Picture
Start 24, add 18, then add 35.
End 77.
After the first step: 42
This is an example. Type the numbers from your problem to start.
Start
example
Added first
example
After the first step
worked out
Added next
example
End
answer
Number sentences
42 = 24 + 18
77 = 42 + 35
Good to know
•
First some are added. Then some are added.
•
Do one step at a time. Find the middle amount first.
•
Every amount stays within 100.
Step-by-step
WE KNOW
Start: 24
Added first: 18
Added next: 35
FIND
after the first step, end
Step 1 · Find after the first step
? = 24 + 18
First: add to the start.
1
2
4
+
1
8
4
2
24 + 10 = 34
34 + 6 = 40
40 + 2 = 42
After the first step: 42
Step 2 · Find end
? = 42 + 35
Then: add to the middle amount.
42 + 30 = 72
72 + 5 = 77
End: 77
Check
Put the numbers back in. Both sides should match.
42 = 24 + 18 ✓
77 = 42 + 35 ✓
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Two-step problems: subtract, then subtract
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Understand place value to 1,000
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