# Math 1A Workbook Review 7 Singapore Part 20

## 1A Workbook Review 7

**Review 7**

**1. Count and then write the numbers in words**
(look at the picture and write the numbers).

**Solution:**

**Count
Result:**

(a) 12

(b) 20

**Numbers in
words:**

(a) Twelve

(b) Twenty

**2. **

**(a) Color 3 (three) watermelons** (as per workbook).

**(b) Color the 3 ^{rd} pineapple from the left** (as per workbook).

**Solution:** Look at the picture for the solution

**3. Arrange the numbers in order**(smallest to greatest).

6 → 14 → 3 → 11 → 7

**Solution:**

3 → 6 → 7 → 11 → 14

**4. Write the missing numbers.**

**(a)**

↗ 4

**(b)**

↗ 7

**Solution:**

(a) 12

(b) 3

**5. Add or subtract.**

(a) 9 + 4 =

(b) 12 – 7 =

**Solution:**

(a) 9 + 4 = 13.

(b) 12 – 7 = 5.

**6. Add or subtract.**

(a) 3 + 6 =

(b) 8 – 7 =

(c) 5 + 5 =

(d) 10 – 2 =

(e) 12 + 4 =

(f) 16 – 3 =

(g) 6 + 8 =

(h) 17 – 8 =

**Solution:**

(a) 3 + 6 = 9.

(b) 8 – 7 = 1.

(c) 5 + 5 = 10.

(d) 10 – 2 = 8.

(e) 12 + 4 = 16.

(f) 16 – 3 = 13.

(g) 6 + 8 = 14.

(h) 17 – 8 = 9.

**7. Fill in the blanks**
(look at the picture and fill in the blanks).

(b) Pencil _____ is the shortest.

(c) Pencil _____ is the longest.

**Solution:**

[A=6 units, B=8 units, C=5 units, D=7 units,
E=6 units]

(a) Pencil ** A** is as long as pencil

**.**

__E__(b) Pencil ** C** is the shortest.

(c) Pencil ** B** is the longest.

**8. Cross out the one which does not belong the same shape.**

**Solution:** Look at the picture for the solution.

**9. Color the 2 (two) pieces that make up the given shape.**

**Solution:** Look at the picture for the solution.

**10. Mary had 10 (ten) eggs. She used 6 (six) of them for baking a cake. How many eggs did she have left?**

**Solution:**

10 – 6 = 4.

She had 4 eggs left.

**11. Ashley had 14 (fourteen) stickers. She gave some of
them to Lily. She had 7 (seven) stickers left. How many stickers did Ashley
give to Lily?**

**Solution:**

14 – 7 = 7.

Ashley gave 7 stickers to Lily.

**12. Emily needs 16 (sixteen) chairs for a party. She has 9
chairs now. How many more chairs does she need?**

**Solution:**

16 – 9 =7.

She needs 7 more chairs.