Practice Problems — Set 16

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. Talk through today's focus: Given a two-digit number, mentally find 10 more or 10 less than the n… 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 296: ___ 2. 46 = ___ tens + ___ ones 3. Expanded form: 56 = ___ + ___ 4. Which is greater: 41 or 48? ___ 5. Write the numeral: 6 tens and 7 ones → ___ 6. Round 63 to the nearest ten: ___ 7. Explain your thinking for set 16 in one sentence. 8. Create your own problem for 1.NBT.C.5.

___________________________ ___________________________ ___________________________ ___________________________

More written practice

1. Apply Given a two-digit number, mentally find 10 more or 10 less than the n… (item 9, set 16): show your work. ___ 2. Apply Given a two-digit number, mentally find 10 more or 10 less than the n… (item 10, set 16): show your work. ___ 3. Apply Given a two-digit number, mentally find 10 more or 10 less than the n… (item 11, set 16): show your work. ___ 4. Apply Given a two-digit number, mentally find 10 more or 10 less than the n… (item 12, set 16): show your work. ___ 5. Apply Given a two-digit number, mentally find 10 more or 10 less than the n… (item 13, set 16): show your work. ___ 6. Apply Given a two-digit number, mentally find 10 more or 10 less than the n… (item 14, set 16): show your work. ___

___________________________ ___________________________ ___________________________ ___________________________ ___________________________

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._

___________________________ ___________________________ ___________________________ ___________________________

Stretch

1. Create your own 1.NBT.C.5 question for a parent to solve. 2. Explain your method in two sentences.

___________________________ ___________________________ ___________________________ ___________________________

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