Common Core Standards Alignment

This worksheet supports the following Common Core State Standards for Mathematics:

• 1.NBT.C.4 Find sums up to 100 (two-digit plus one-digit, or plus a multiple of 10) with models and place value, making a new ten when needed.
• 1.NBT.C.6 Subtract one multiple of 10 from another (between 10 and 90, answer zero or more), such as 70 - 40, using models or place value.
• 2.NBT.B.5 Add and subtract to 100 fluently with place-value strategies, properties of addition, or the link between adding and subtracting.
• 2.NBT.B.6 Find the sum of two, three or four two-digit numbers using place value and properties of addition.
• 2.NBT.B.7 Add and subtract to 1,000 with models and place-value strategies, working hundreds, tens and ones separately and regrouping tens or hundreds as needed.
• 2.NBT.B.9 Tell why an adding or subtracting method gives the right answer, reasoning from place value and number properties.

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