Practice Problems — Set 18
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 329: ___ 2. 49 = ___ tens + ___ ones 3. Expanded form: 59 = ___ + ___
_See printable PDF for diagram._
Written practice
1. Write the value of the underlined digit in 318: ___ 2. 48 = ___ tens + ___ ones 3. Expanded form: 58 = ___ + ___ 4. Which is greater: 43 or 50? ___ 5. Write the numeral: 6 tens and 3 ones → ___ 6. Round 65 to the nearest ten: ___ 7. Write the value of the underlined digit in 351: ___ 8. 51 = ___ tens + ___ ones
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More written practice
1. Expanded form: 61 = ___ + ___ 2. Which is greater: 46 or 53? ___ 3. Write the numeral: 6 tens and 6 ones → ___ 4. Round 68 to the nearest ten: ___ 5. Write the value of the underlined digit in 384: ___ 6. 54 = ___ tens + ___ ones
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Patterns and rules
1. Write the value of the underlined digit in 505: ___ 2. 65 = ___ tens + ___ ones 3. Expanded form: 75 = ___ + ___
_See printable PDF for diagram._
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Stretch
1. Write the value of the underlined digit in 593: ___ 2. 73 = ___ tens + ___ ones
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Parent tip: Use base-ten blocks or place-value charts