Addition
Horizontal two-addend addition
Add two one- or two-digit values in equation form using selected positive, negative, or mixed signed addends, with an optional zero-operand setting.
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Two-digit addition with fixed endings
Add two-digit values chosen from a range with selected final digits, including optional signed-number practice.
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Read each horizontal equation, keep every sign with its number, and add. Look for patterns created by the selected ending digits.
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What this activity builds
Use controlled ones digits to predict regrouping and explain patterns in two-digit sums.
Worked example
What is 47 + 27?
74
Seven ones plus seven ones is 14 ones; regroup 1 ten, then add 4 + 2 + 1 tens.
Teaching notes
Make the practice count
- Highlight the ending digits before solving to predict whether the ones will regroup.
- Treat negative or mixed-sign settings as an advanced extension and model them on a number line.
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Related activities
Addition
Addition with selected regrouping columns
Practice vertical addition where regrouping occurs in teacher-selected place-value columns and nowhere else.
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