Here’s the completed
Unit 9 Test with explanations for each section:
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Section 1: Break down numbers into tens and ones
>
42 = ___ tens ___ ones
✔ 4 tens 2 ones
*Explanation:* The digit in the tens place is 4 → 4 tens (40). The digit in the ones place is 2 → 2 ones. So, 42 = 40 + 2.
>
35 = ___ tens ___ ones
✔ 3 tens 5 ones
*Explanation:* 3 in the tens place = 30, 5 in the ones place = 5 → 35 = 30 + 5.
>
28 = ___ tens ___ ones
✔ 2 tens 8 ones
*Explanation:* 2 in tens place = 20, 8 in ones place = 8 → 28 = 20 + 8.
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Section 2: Color in 36. Fill in the blanks.
You’re shown 6 rods (each = 10) and 10 small cubes (each = 1). You need to color
36 — that means
3 rods (30) and
6 cubes (6).
>
___ tens ___ ones
✔ 3 tens 6 ones
>
___ + ___ = ___
✔ 30 + 6 = 36
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Section 3: Convert “tens and ones” to numbers
>
5 tens 3 ones = ___
✔ 53
*Explanation:* 5 tens = 50, 3 ones = 3 → 50 + 3 = 53.
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2 tens 5 ones = ___
✔ 25
*Explanation:* 20 + 5 = 25.
>
4 tens 6 ones = ___
✔ 46
*Explanation:* 40 + 6 = 46.
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Section 4: Simple addition
>
20 + 4 = ___
✔ 24
>
40 + 3 = ___
✔ 43
>
30 + 7 = ___
✔ 37
>
10 + 2 = ___
✔ 12
*(These are straightforward additions combining tens and ones.)*
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Section 5: Color in 48. Fill in the blanks.
Color
4 rods (40) and
8 cubes (8) to make 48.
>
___ tens ___ ones
✔ 4 tens 8 ones
>
___ + ___ = ___
✔ 40 + 8 = 48
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Section 6: Write in expanded form
>
Write 26 in expanded form.
✔ 20 + 6
*Explanation:* Expanded form breaks the number into its place values: 20 (tens) + 6 (ones).
>
Write 45 in expanded form.
✔ 40 + 5
*Explanation:* 40 (tens) + 5 (ones).
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✔ Final Completed Answers:
Top Section:
- 42 =
4 tens
2 ones
- 35 =
3 tens
5 ones
- 28 =
2 tens
8 ones
Color in 36:
-
3 tens
6 ones
-
30 +
6 =
36
Convert tens/ones to numbers:
- 5 tens 3 ones =
53
- 2 tens 5 ones =
25
- 4 tens 6 ones =
46
Addition:
- 20 + 4 =
24
- 40 + 3 =
43
- 30 + 7 =
37
- 10 + 2 =
12
Color in 48:
-
4 tens
8 ones
-
40 +
8 =
48
Expanded Form:
- 26 =
20 +
6
- 45 =
40 +
5
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This test focuses on understanding
place value (tens and ones),
expanded form, and
basic addition — all foundational skills for early math! 🎯
Parent Tip: Review the logic above to help your child master the concept of place value worksheet year one.
