Practice Problems — Set 1

1.NBT.C.5 · Given a two-digit number, mentally find 10 more or 10 less than the n…

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

Warm-up

1. Write the value of the underlined digit in 142: ___ 2. 32 = ___ tens + ___ ones 3. Expanded form: 42 = ___ + ___

_See printable PDF for diagram._

Written practice

1. Write the value of the underlined digit in 131: ___ 2. 31 = ___ tens + ___ ones 3. Expanded form: 41 = ___ + ___ 4. Which is greater: 26 or 33? ___ 5. Write the numeral: 6 tens and 4 ones → ___ 6. Round 48 to the nearest ten: ___ 7. Write the value of the underlined digit in 164: ___ 8. 34 = ___ tens + ___ ones

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More written practice

1. Expanded form: 44 = ___ + ___ 2. Which is greater: 29 or 36? ___ 3. Write the numeral: 6 tens and 7 ones → ___ 4. Round 51 to the nearest ten: ___ 5. Write the value of the underlined digit in 197: ___ 6. 37 = ___ tens + ___ ones

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Patterns and rules

1. Write the value of the underlined digit in 318: ___ 2. 48 = ___ tens + ___ ones 3. Expanded form: 58 = ___ + ___

_See printable PDF for diagram._

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