Practice Problems — Set 20
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 351: ___ 2. 51 = ___ tens + ___ ones 3. Expanded form: 61 = ___ + ___
_See printable PDF for diagram._
Written practice
1. Write the value of the underlined digit in 340: ___ 2. 50 = ___ tens + ___ ones 3. Expanded form: 60 = ___ + ___ 4. Which is greater: 45 or 52? ___ 5. Write the numeral: 6 tens and 5 ones → ___ 6. Round 67 to the nearest ten: ___ 7. Write the value of the underlined digit in 373: ___ 8. 53 = ___ tens + ___ ones
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More written practice
1. Expanded form: 63 = ___ + ___ 2. Which is greater: 48 or 55? ___ 3. Write the numeral: 6 tens and 8 ones → ___ 4. Round 70 to the nearest ten: ___ 5. Write the value of the underlined digit in 406: ___ 6. 56 = ___ tens + ___ ones
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Patterns and rules
1. Write the value of the underlined digit in 527: ___ 2. 67 = ___ tens + ___ ones 3. Expanded form: 77 = ___ + ___
_See printable PDF for diagram._
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Stretch
1. Write the value of the underlined digit in 615: ___ 2. 75 = ___ tens + ___ ones
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Parent tip: Use base-ten blocks or place-value charts