Year 4 maths · I.1 · Add and Subtract to 1,000
Add three-digit numbers with regrouping
Every one needs a trade. 10 ones make 1 ten; 10 tens make 1 hundred.
See worked examples
348 + 408 =
Answer: 756
122 + 281 =
Answer: 403
257 + 419 =
Answer: 676
Tip: Every one needs a trade. 10 ones make 1 ten; 10 tens make 1 hundred.
On paper: this skill is in the printable pack Grade 3 Common Core Math: Number and Operations, with an answer key.
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