Two Digit Dynamo Worksheet
Math Fluency Numbers Within 100
Two Digit Dynamo Worksheet
Mastering Standard Form, Expanded Form, and Word Form
Name:
Date:
Dynamo Reference Tool: 3 Ways to Show a Number
1. Standard Form
47
The digits alone
2. Expanded Form
40 + 7
Value of each digit (4 tens + 7 ones)
3. Word Form
forty-seven
Number written in words (hyphen!)
Spelling Bank: twenty • thirty • forty (no "u"!) • fifty • sixty • seventy • eighty • ninety
A Conversion Matrix: Fill in the Missing Forms
Use hyphens for compound words (e.g., sixty-four)
| Standard | Tens & Ones | Expanded Form | Word Form |
|---|
| 38 | 3 tens + 8 ones | | |
| | | |
|
|
| 7 tens + 2 ones | 70 + 2 |
|
|
|
| 50 + 9 | fifty-nine |
| 94 |
|
|
|
|
| 8 tens + 0 ones |
| eighty |
B Expanded Form Sprint: Decompose and Compose
Write in Expanded Form: e.g., 20 + 5
62 =
45 =
81 =
17 =
Write in Standard Form: e.g., 30 + 4 = 34
70 + 6 =
20 + 9 =
90 + 3 =
50 + 0 =
Two Digit Dynamo • Grade 2 Fluency Page 1 of 2 • Continue on Page 2 →
Part 2: Word Form Mastery & Problem Solving
Careful spelling, hyphenation, and place-value detective work
Page 2
C Word Form Writing: Write Each Number in Words
1. 43 (4 tens and 3 ones)
2. 75 (7 tens and 5 ones)
3. 28 (2 tens and 8 ones)
4. 96 (9 tens and 6 ones)
D Fix the Glitch! Spot and Correct the Mistake
Glitch 1: Place Value Misunderstanding
Maya wrote the expanded form of 54 as: 5 + 4
What error did Maya make? Write the correct expanded form:
Glitch 2: Word Form Spelling
Leo wrote the word form of 48 as: fourty eight
Identify the two errors (spelling and punctuation) and rewrite correctly:
E Number Detective: Mystery Numbers
Clue 1:
"I have 6 tens and 7 ones. What is my word form and expanded form?"
Expanded:
Word:
Clue 2:
"My word form is eighty-four. How do you write me in standard and expanded form?"
Standard:
Expanded:
Fluency Checklist: I remembered the hyphen in 2-digit number words. I spelled "forty" without a "u". Expanded form shows full tens values (e.g., 50 + 4).
Two Digit Dynamo • Printable Worksheet Page 2 of 2
Value Sprint Task Cards
Math Center
Value Sprint Task Cards • Set 1 (Cards 1–6)
Cut along dashed lines for station cards
CARD 01 Expand It!
Standard Form
58
Write this number in expanded form and in word form.
Record answers in Box 1 on your sheet
CARD 02 Assemble It!
Expanded Form
70 + 4
Write this number in standard form and in word form.
Record answers in Box 2 on your sheet
CARD 03 Word Detective
Word Form
thirty-six
Write this number in standard form and in expanded form.
Record answers in Box 3 on your sheet
CARD 04 Place Value Blocks
Place Value Clue
8 tens and 2 ones
Write this number in standard, expanded, and word form.
Record answers in Box 4 on your sheet
CARD 05 Spelling Sprint
Standard Form
49
Watch the spelling of the tens digit! Write 49 in word form.
Record answers in Box 5 on your sheet
CARD 06 Zero Hero
Standard Form
90
How many ones? Write 90 in expanded form and word form.
Record answers in Box 6 on your sheet
Two Digit Dynamo • Value Sprint Cards Page 1 of 3 (Cards 1–6)
Math Center
Value Sprint Task Cards • Set 2 (Cards 7–12)
Cut along dashed lines for station cards
CARD 07 Assemble It!
Expanded Form
60 + 7
Write this number in standard form and in word form.
Record answers in Box 7 on your sheet
CARD 08 Word Detective
Word Form
eighty-three
Write this number in standard form and in expanded form.
Record answers in Box 8 on your sheet
CARD 09 Expand It!
Standard Form
25
Write this number in expanded form and in word form.
Record answers in Box 9 on your sheet
