Practice Problems — Set 10

2.NBT.B.5 · Fluently add and subtract within 100 using strategies based on place…

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

Warm-up

1. Talk through today's focus: Fluently add and subtract within 100 using strategies based on place… 2. Try one oral example together before writing. 3. Use the diagram to explain your thinking.

_See printable PDF for diagram._

Written practice

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: ___ 7. Apply Fluently add and subtract within 100 using strategies based on place… (item 7, set 10): show your work. ___ 8. Apply Fluently add and subtract within 100 using strategies based on place… (item 8, set 10): show your work. ___

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More written practice

1. Apply Fluently add and subtract within 100 using strategies based on place… (item 9, set 10): show your work. ___ 2. Apply Fluently add and subtract within 100 using strategies based on place… (item 10, set 10): show your work. ___ 3. Apply Fluently add and subtract within 100 using strategies based on place… (item 11, set 10): show your work. ___ 4. Apply Fluently add and subtract within 100 using strategies based on place… (item 12, set 10): show your work. ___ 5. Apply Fluently add and subtract within 100 using strategies based on place… (item 13, set 10): show your work. ___ 6. Apply Fluently add and subtract within 100 using strategies based on place… (item 14, set 10): show your work. ___

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Patterns and rules

1. Each place is ten times the place to its right. 2. Compare from the largest place first. 3. Expanded form shows the value of each digit.

_See printable PDF for diagram._

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