Let's solve each problem step by step:
---
Problem 1: What is the value of the 6 in the number 68?
- The number 68 has two digits: 6 and 8.
- The digit 6 is in the
tens place.
- Therefore, the value of 6 in 68 is
60.
Answer: 60
---
Problem 2: Write down the next three numbers in this list: 8, 10, 12, 14
- The sequence increases by 2 each time:
- 8 + 2 = 10
- 10 + 2 = 12
- 12 + 2 = 14
- Continuing this pattern:
- 14 + 2 = 16
- 16 + 2 = 18
- 18 + 2 = 20
Answer: 16, 18, 20
---
Problem 3: You know that 13 + 4 = 17. What is 17 - 13? What is 17 - 4?
-
17 - 13: Subtracting 13 from 17 gives:
- 17 - 13 = 4
-
17 - 4: Subtracting 4 from 17 gives:
- 17 - 4 = 13
Answers:
- 17 - 13 = 4
- 17 - 4 = 13
---
Problem 4: What is 3 + 6?
- Adding 3 and 6:
- 3 + 6 = 9
Answer: 9
---
Problem 5: Which three numbers could have a sum of 15?
- We need to find three numbers that add up to 15. There are many possible combinations, but one simple example is:
- 5 + 5 + 5 = 15
Answer: 5, 5, 5 (Other valid answers include 1, 5, 9; 2, 6, 7; etc.)
---
Problem 6: 3 + 3 + 3 + 3 is the same as □ × 3. What number is □?
- The expression 3 + 3 + 3 + 3 can be rewritten as multiplication:
- 3 + 3 + 3 + 3 = 4 × 3
- Therefore, □ = 4.
Answer: 4
---
Problem 7: What is half of 12?
- To find half of 12, divide 12 by 2:
- 12 ÷ 2 = 6
Answer: 6
---
Problem 8: What are eight 10s?
- Eight 10s means multiplying 8 by 10:
- 8 × 10 = 80
Answer: 80
---
Final Answers:
1.
60
2.
16, 18, 20
3.
4, 13
4.
9
5.
5, 5, 5 (or other valid combinations)
6.
4
7.
6
8.
80
Boxed Final Answer:
\[
\boxed{60, 16, 18, 20, 4, 13, 9, 5, 5, 5, 4, 6, 80}
\]
Parent Tip: Review the logic above to help your child master the concept of 2nd grade math test.
