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➕ Grade 1 Math: Addition Using Expanded Form
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Addition Using Expanded Form

Grade 1 Mathematics • Place Value & Addition
Score / 10
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Grade & Section:
Date:
First Name M.I. Last Name
Direction: Find the sum using the expanded form. Break down each two-digit number into Tens and Ones, add them together, and write the total sum in the box.
💡 Quick Concept Model: Expand into Tens + Ones:
43 = 40 + 3  |  + 25 = 20 + 5  ➔  60 + 8 = 68
1
 61
=
  +  
+32
=
  +  
 
=
  +  
2
 23
=
  +  
+34
=
  +  
 
=
  +  
3
 73
=
  +  
+14
=
  +  
 
=
  +  
4
 41
=
  +  
+14
=
  +  
 
=
  +  
5
 36
=
  +  
+11
=
  +  
 
=
  +  
6
 52
=
  +  
+40
=
  +  
 
=
  +  
7
 62
=
  +  
+14
=
  +  
 
=
  +  
8
 54
=
  +  
+15
=
  +  
 
=
  +  
9
 80
=
  +  
+14
=
  +  
 
=
  +  
10
 61
=
  +  
+27
=
  +  
 
=
  +  
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Kiddie Blocks
Tutorial Center • Quezon City

Addition Using Expanded Form

Official Answer Key & Teacher Guide
KEY 10/10
Teacher & Parent Tip: Expanded form reinforces place-value understanding before vertical carrying/regrouping is introduced. Encourage the child to verbalize: "61 has 6 tens (60) and 1 one. 32 has 3 tens (30) and 2 ones. Ones: 1 + 2 = 3. Tens: 60 + 30 = 90. 90 + 3 = 93!"
1
 61
=
60 + 1
+32
=
30 + 2
93
=
90 + 3
2
 23
=
20 + 3
+34
=
30 + 4
57
=
50 + 7
3
 73
=
70 + 3
+14
=
10 + 4
87
=
80 + 7
4
 41
=
40 + 1
+14
=
10 + 4
55
=
50 + 5
5
 36
=
30 + 6
+11
=
10 + 1
47
=
40 + 7
6
 52
=
50 + 2
+40
=
40 + 0
92
=
90 + 2
7
 62
=
60 + 2
+14
=
10 + 4
76
=
70 + 6
8
 54
=
50 + 4
+15
=
10 + 5
69
=
60 + 9
9
 80
=
80 + 0
+14
=
10 + 4
94
=
90 + 4
10
 61
=
60 + 1
+27
=
20 + 7
88
=
80 + 8