Practice Problems — Set 8

1.NBT.C.4 · Add within 100, including adding a two-digit number and a one-digit n…

Print and write your answers. Use diagrams to show thinking.

Warm-up

1. Write the value of the underlined digit in 219: ___ 2. 39 = ___ tens + ___ ones 3. Expanded form: 49 = ___ + ___

_See printable PDF for diagram._

Written practice

1. Write the value of the underlined digit in 208: ___ 2. 38 = ___ tens + ___ ones 3. Expanded form: 48 = ___ + ___ 4. Which is greater: 33 or 40? ___ 5. Write the numeral: 6 tens and 5 ones → ___ 6. Round 55 to the nearest ten: ___ 7. Write the value of the underlined digit in 241: ___ 8. 41 = ___ tens + ___ ones

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More written practice

1. Expanded form: 51 = ___ + ___ 2. Which is greater: 36 or 43? ___ 3. Write the numeral: 6 tens and 8 ones → ___ 4. Round 58 to the nearest ten: ___ 5. Write the value of the underlined digit in 274: ___ 6. 44 = ___ tens + ___ ones

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Patterns and rules

1. Write the value of the underlined digit in 395: ___ 2. 55 = ___ tens + ___ ones 3. Expanded form: 65 = ___ + ___

_See printable PDF for diagram._

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Parent tip: Use base-ten blocks or place-value charts