Let’s solve each riddle one by one. Remember:
- “Tens” means how many groups of 10.
- “Ones” means single units.
So, to find the number: multiply tens by 10, then add ones.
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Riddle 1: I have 3 tens and 23 ones.
→ 3 × 10 = 30
→ 30 + 23 =
53
Wait — that’s unusual because normally we don’t have more than 9 ones in a place value chart. But the problem says you may need Base Ten blocks — so maybe it’s okay to have extra ones? Let’s check if they want us to regroup.
Actually, let’s think again: If you have 23 ones, that’s 2 full tens and 3 leftover ones. So total tens = 3 + 2 = 5 tens, and 3 ones → 53. Same answer.
But let’s see what the worksheet expects. Since it says “you may need to use Base Ten blocks”, it probably allows having more than 9 ones, and you just add them directly.
So for now, we’ll go with direct addition unless told otherwise.
---
Riddle 1: 3 tens + 23 ones = 30 + 23 =
53
Riddle 2: 5 tens + 18 ones = 50 + 18 =
68
Riddle 3: 5 tens + 15 ones = 50 + 15 =
65
Riddle 4: 3 tens + 31 ones = 30 + 31 =
61
Riddle 5: 1 ten + 34 ones = 10 + 34 =
44
Riddle 6: 6 tens + 17 ones = 60 + 17 =
77
Riddle 7: 6 tens + 21 ones = 60 + 21 =
81
Riddle 8: 3 tens + 33 ones = 30 + 33 =
63
Riddle 9: 5 tens + 14 ones = 50 + 14 =
64
Riddle 10: 7 tens + 28 ones = 70 + 28 =
98
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Now, let’s double-check each:
1. 3×10=30; 30+23=53
✔
2. 5×10=50; 50+18=68
✔
3. 5×10=50; 50+15=65
✔
4. 3×10=30; 30+31=61
✔
5. 1×10=10; 10+34=44
✔
6. 6×10=60; 60+17=77
✔
7. 6×10=60; 60+21=81
✔
8. 3×10=30; 30+33=63
✔
9. 5×10=50; 50+14=64
✔
10. 7×10=70; 70+28=98
✔
All correct.
Final Answer:
53, 68, 65, 61, 44, 77, 81, 63, 64, 98
Parent Tip: Review the logic above to help your child master the concept of place value worksheet mystery number.
