Let's solve each problem step by step:
---
1. \( 1 \times 1 + 20 = \)
- First, calculate the multiplication: \( 1 \times 1 = 1 \)
- Then, add 20: \( 1 + 20 = 21 \)
-
Answer: \( 21 \)
---
2. \( 6 \times 2 = \)
- Multiply 6 by 2: \( 6 \times 2 = 12 \)
-
Answer: \( 12 \)
---
3. \( 7 \times 4 + 4 = \)
- First, calculate the multiplication: \( 7 \times 4 = 28 \)
- Then, add 4: \( 28 + 4 = 32 \)
-
Answer: \( 32 \)
---
4. \( 250 - 20 = \)
- Subtract 20 from 250: \( 250 - 20 = 230 \)
-
Answer: \( 230 \)
---
5. \( 150 + 200 = \)
- Add 150 and 200: \( 150 + 200 = 350 \)
-
Answer: \( 350 \)
---
6. \( 2 \times 3 + 6 = \)
- First, calculate the multiplication: \( 2 \times 3 = 6 \)
- Then, add 6: \( 6 + 6 = 12 \)
-
Answer: \( 12 \)
---
7. \( 1 \times 100 + 100 = \)
- First, calculate the multiplication: \( 1 \times 100 = 100 \)
- Then, add 100: \( 100 + 100 = 200 \)
-
Answer: \( 200 \)
---
8. \( 3 \times 4 - 2 = \)
- First, calculate the multiplication: \( 3 \times 4 = 12 \)
- Then, subtract 2: \( 12 - 2 = 10 \)
-
Answer: \( 10 \)
---
9. \( 12 \times 3 = \)
- Multiply 12 by 3: \( 12 \times 3 = 36 \)
-
Answer: \( 36 \)
---
10. \( 200 - 200 = \)
- Subtract 200 from 200: \( 200 - 200 = 0 \)
-
Answer: \( 0 \)
---
11. \( 7 \times 5 = \)
- Multiply 7 by 5: \( 7 \times 5 = 35 \)
-
Answer: \( 35 \)
---
12. Two times two plus two =
- First, calculate "two times two": \( 2 \times 2 = 4 \)
- Then, add two: \( 4 + 2 = 6 \)
-
Answer: \( 6 \)
---
13. Six times three plus five =
- First, calculate "six times three": \( 6 \times 3 = 18 \)
- Then, add five: \( 18 + 5 = 23 \)
-
Answer: \( 23 \)
---
14. Nine times nine plus nine =
- First, calculate "nine times nine": \( 9 \times 9 = 81 \)
- Then, add nine: \( 81 + 9 = 90 \)
-
Answer: \( 90 \)
---
15. Twenty-two plus fifty =
- Add twenty-two and fifty: \( 22 + 50 = 72 \)
-
Answer: \( 72 \)
---
Final Answers:
1. \( 21 \)
2. \( 12 \)
3. \( 32 \)
4. \( 230 \)
5. \( 350 \)
6. \( 12 \)
7. \( 200 \)
8. \( 10 \)
9. \( 36 \)
10. \( 0 \)
11. \( 35 \)
12. \( 6 \)
13. \( 23 \)
14. \( 90 \)
15. \( 72 \)
Boxed Final Answer:
\[
\boxed{21, 12, 32, 230, 350, 12, 200, 10, 36, 0, 35, 6, 23, 90, 72}
\]
Parent Tip: Review the logic above to help your child master the concept of mental math practice worksheet.
