Review — Difficulty 5/10

2.NBT.B.8 · Mentally add 10 or 100 to a given number 100-900, and mentally subtra…

Review skills for this standard. Write answers where shown.

Together with a parent

1. Discuss: Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 10… 2. What was easy? What was tricky? 3. Use the diagram to model one example.

Written review

1. Write the value of the underlined digit in 230: ___ 2. 40 = ___ tens + ___ ones 3. Expanded form: 50 = ___ + ___ 4. Which is greater: 35 or 42? ___ 5. Write the numeral: 7 tens and 7 ones → ___ 6. Round 57 to the nearest ten: ___

_See printable PDF for diagram._

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Skills checklist

• [ ] Identifies value of each digit
• [ ] Writes expanded form
• [ ] Reads and writes numbers in standard form

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