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Tutorial Center • Quezon City

Addition in Expanded Form

DepEd MATATAG Grade 1 Math • Level 1: Adding 2-Digit & 1-Digit
Score / 6
Name:
Grade & Section:
Date:
Direction Break the two-digit number into Tens and Ones. Add the ones, then write the total sum.
💡 MATATAG Model: Break into Tens + Ones:
45 + 3 = (40 + 5) + 3 = 40 + (5 + 3) = 40 + 8 = 48
1
Tens Ones
 34
=
  +  
+5
=
+  
 
=
  +  
2
Tens Ones
 52
=
  +  
+6
=
+  
 
=
  +  
3
Tens Ones
 73
=
  +  
+4
=
+  
 
=
  +  
4
Tens Ones
 61
=
  +  
+8
=
+  
 
=
  +  
5
Tens Ones
 42
=
  +  
+7
=
+  
 
=
  +  
6
Tens Ones
 83
=
  +  
+5
=
+  
 
=
  +  
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Kiddie Blocks
Tutorial Center • Quezon City

Addition in Expanded Form

DepEd MATATAG Grade 1 Math • Level 2: Adding Two 2-Digit Numbers
Score / 6
Name:
Grade & Section:
Date:
Direction Break both numbers into Tens and Ones. Add each column, then write the total sum.
💡 MATATAG Model: Break both numbers:
32 + 25 = (30 + 2) + (20 + 5) = 50 + 7 = 57
7
Tens Ones
 24
=
  +  
+33
=
  +  
 
=
  +  
8
Tens Ones
 41
=
  +  
+26
=
  +  
 
=
  +  
9
Tens Ones
 53
=
  +  
+34
=
  +  
 
=
  +  
10
Tens Ones
 62
=
  +  
+25
=
  +  
 
=
  +  
11
Tens Ones
 36
=
  +  
+41
=
  +  
 
=
  +  
12
Tens Ones
 74
=
  +  
+23
=
  +  
 
=
  +  
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Kiddie Blocks
Tutorial Center • Quezon City

Addition in Expanded Form

DepEd MATATAG Grade 1 Math • Level 3: Real-World Word Problems
Score / 4
Name:
Grade & Section:
Date:
Direction Read each story problem. Write the expanded form for both numbers, add them up, and complete the answer.
13
Lito harvested 34 sweet mangoes. His sister Maya harvested 23 mangoes. How many mangoes did they harvest in all?
Expanded Form: (30 + 4) + (20 + 3) =   +  
Total:   mangoes
14
Kuya Jun baked 42 pieces of fresh pandesal in the morning and 35 in the afternoon. How many pandesal did he bake altogether?
Expanded Form: (40 + 2) + (30 + 5) =   +  
Total:   pandesal
15
In the school garden, Grade 1 pupils planted 51 yellow marigolds and 27 red roses. How many flowering plants are there in total?
Expanded Form: (50 + 1) + (20 + 7) =   +  
Total:   flowers
16
Aling Rosa sold 63 red apples on Saturday and 32 red apples on Sunday. What is the total number of apples sold?
Expanded Form: (60 + 3) + (30 + 2) =   +  
Total:   apples
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Teacher & Parent Solution Key

Grade 1 Mathematics • Addition in Expanded Form (MATATAG Edition)
Official Answer Key
DepEd MATATAG Aligned
Page 1: Level 1 Solutions 2-Digit & 1-Digit Addition
1. 34 + 5
(30 + 4) + 5 = 30 + 9
Sum: 39
2. 52 + 6
(50 + 2) + 6 = 50 + 8
Sum: 58
3. 73 + 4
(70 + 3) + 4 = 70 + 7
Sum: 77
4. 61 + 8
(60 + 1) + 8 = 60 + 9
Sum: 69
5. 42 + 7
(40 + 2) + 7 = 40 + 9
Sum: 49
6. 83 + 5
(80 + 3) + 5 = 80 + 8
Sum: 88
Page 2: Level 2 Solutions Two 2-Digit Numbers Addition
7. 24 + 33
(20 + 4) + (30 + 3) = 50 + 7
Sum: 57
8. 41 + 26
(40 + 1) + (20 + 6) = 60 + 7
Sum: 67
9. 53 + 34
(50 + 3) + (30 + 4) = 80 + 7
Sum: 87
10. 62 + 25
(60 + 2) + (20 + 5) = 80 + 7
Sum: 87
11. 36 + 41
(30 + 6) + (40 + 1) = 70 + 7
Sum: 77
12. 74 + 23
(70 + 4) + (20 + 3) = 90 + 7
Sum: 97
Page 3: Level 3 Word Problems Solutions Real-World Contexts
13. Lito & Maya (Mangoes):
(30 + 4) + (20 + 3) = 50 + 7
Answer: 57 mangoes
14. Kuya Jun (Pandesal):
(40 + 2) + (30 + 5) = 70 + 7
Answer: 77 pandesal
15. Grade 1 Garden (Flowers):
(50 + 1) + (20 + 7) = 70 + 8
Answer: 78 flowers
16. Aling Rosa (Apples):
(60 + 3) + (30 + 2) = 90 + 5
Answer: 95 apples
MATATAG Mastery Diagnostic Rubric & Remediation Tips
Performance Level Observed Student Understanding Recommended Teacher/Tutor Next Steps
Mastery (14-16 pts) Accurately decomposes 2-digit numbers into tens and ones; computes sums quickly without confusion between place values. Challenge with 3-digit expanded form or mental decomposition drills without writing intermediate steps.
Developing (10-13 pts) Can break down numbers correctly but sometimes makes counting errors in ones or omits the zero in tens. Reinforce with place value discs or play money (10-peso and 1-peso coins) to anchor values.
Needs Support (<10 pts) Struggles to identify the place value of digits (e.g. treats 3 tens as 3 instead of 30). Use bundled popsicle sticks (bundles of 10) and single sticks to physically model each problem before writing.