Let's solve each problem step by step:
---
1) \( 17 - 8 \)
- Subtract 8 from 17:
\[
17 - 8 = 9
\]
-
Answer: \( 9 \)
---
2) Halve 18
- Divide 18 by 2:
\[
18 \div 2 = 9
\]
-
Answer: \( 9 \)
---
3) What fraction is shaded?
- The shape is a pentagon divided into 5 equal parts.
- 2 out of the 5 parts are shaded.
- The fraction of the shaded part is:
\[
\frac{2}{5}
\]
-
Answer: \( \frac{2}{5} \)
---
4) 3 dimes = ____ nickels
- 1 dime = 10 cents
- 3 dimes = \( 3 \times 10 = 30 \) cents
- 1 nickel = 5 cents
- Number of nickels in 30 cents:
\[
30 \div 5 = 6
\]
-
Answer: \( 6 \)
---
5) What is the name of this shape?
- The shape shown is a cylinder.
-
Answer: \( \text{cylinder} \)
---
6) How many cm in \( \frac{1}{2} \) m?
- 1 meter = 100 centimeters
- \( \frac{1}{2} \) meter = \( \frac{1}{2} \times 100 = 50 \) centimeters
-
Answer: \( 50 \)
---
7) \( 200 + 40 + 9 \)
- Add the numbers step by step:
\[
200 + 40 = 240
\]
\[
240 + 9 = 249
\]
-
Answer: \( 249 \)
---
8) What is the next number? \( 30, 35, 40, 45, 50, \_\_ \)
- The sequence increases by 5 each time:
\[
50 + 5 = 55
\]
-
Answer: \( 55 \)
---
9) \( 7 + 7 + 7 + 7 = \_\_ \times 7 \)
- Adding 7 four times is the same as multiplying 7 by 4:
\[
7 + 7 + 7 + 7 = 4 \times 7
\]
-
Answer: \( 4 \)
---
10) What number is 10 less than 54?
- Subtract 10 from 54:
\[
54 - 10 = 44
\]
-
Answer: \( 44 \)
---
11) 3 dimes + 2 nickels
- 1 dime = 10 cents, so 3 dimes = \( 3 \times 10 = 30 \) cents
- 1 nickel = 5 cents, so 2 nickels = \( 2 \times 5 = 10 \) cents
- Total value:
\[
30 + 10 = 40 \text{ cents}
\]
-
Answer: \( 40 \) cents
---
12) How many sides does an octagon have?
- An octagon has 8 sides.
-
Answer: \( 8 \)
---
13) How many more is 14 than 8?
- Subtract 8 from 14:
\[
14 - 8 = 6
\]
-
Answer: \( 6 \)
---
14) I run 2 miles every day for a week. How far have I run?
- A week has 7 days.
- Distance run per day = 2 miles
- Total distance run in a week:
\[
2 \times 7 = 14 \text{ miles}
\]
-
Answer: \( 14 \) miles
---
15) 1 yard = 3 feet. How many feet in 5 yards?
- 1 yard = 3 feet
- 5 yards = \( 5 \times 3 = 15 \) feet
-
Answer: \( 15 \) feet
---
16) Which of these numbers is odd? \( 260, 152, 386, 351 \)
- Check each number:
- 260: Even (ends in 0)
- 152: Even (ends in 2)
- 386: Even (ends in 6)
- 351: Odd (ends in 1)
-
Answer: \( 351 \)
---
Final Answers:
\[
\boxed{
\begin{array}{l}
1) \, 9 \\
2) \, 9 \\
3) \, \frac{2}{5} \\
4) \, 6 \\
5) \, \text{cylinder} \\
6) \, 50 \\
7) \, 249 \\
8) \, 55 \\
9) \, 4 \\
10) \, 44 \\
11) \, 40 \, \text{cents} \\
12) \, 8 \\
13) \, 6 \\
14) \, 14 \, \text{miles} \\
15) \, 15 \, \text{feet} \\
16) \, 351 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of mental maths worksheets.
