Math 1A Workbook Review 5 Singapore Part 15
1A Workbook Review 5
Review 5
1. Add.
(a) 10 + 5 =
(b) 10 + 10 =
Solution:
(a) 10 + 5 = 15.
(b) 10 + 10 = 20.
2. Fill in the missing
numbers (instead of ⬜).
(a)
18
(b)
15
(c) 14 is ____ and 4.
(d) 12 is 10 and ____.
Solution:
(a) 10
(b) 5
(c) 10
(d) 2
3. Fill in the missing
number.
|
(a)
|
11
|
|
13
|
14
|
|
(b)
|
17
|
18
|
|
20
|
|
(c)
|
16
|
15
|
|
13
|
|
(d)
|
12
|
14
|
|
18
|
Solution:
(a) 12
(b) 19
(c) 14
(d) 16
4. Fill in the blanks
(as per set)
|
A
|
🍐.🍐.🍐.🍐
🍐.🍐.🍐.🍐 |
|
B
|
🍐.🍐.🍐.🍐.🍐
🍐.🍐.🍐.🍐.🍐 |
|
C
|
🍐.🍐.🍐
🍐.🍐.🍐 |
(a) Set _____ has the
greatest numbers of pears.
(b) Set _____ has the
smallest numbers of pears.
Solution:
(a) B
(b) C
5. Add or subtract.
(a) 8 + 5 =
(b) 13 – 9 =
Solution:
(a) 8 + 5 = 13.
(b) 13 – 9 = 4.
6. Complete the number
sentences.
(a)
7 + 3 =
7 + 4 =
7 + 5 =
(b)
10 – 8 =
11 – 8 =
12 – 8 =
Solution:
(a)
7 + 3 = 10.
7 + 4 = 11.
7 + 5 = 12.
(b)
10 – 8 = 2.
11 – 8 = 3.
12 – 8 = 4.
7. Write the missing
numbers.
(a) 6
+ ⬜ = 13.
(b) 14 – 3 = ⬜.
Solution:
(a) 7
(b) 11
8. Write the missing
number in each set.
Solution:
[view question as black
font and solution as red font as per the below picture]
Solution:
12 – 5 = 7.
He had 7 cookies left.
10. Joe has 14
pencils. He buys 3 more. How many pencils does he have now?
Solution:
14 + 3 = 17.
He has 17 pencils now.
11. Dani and Matthew
have 15 books altogether. Dani has 8 books. How many books does Mathew have?
Solution:
15 – 8 = 7.
Matthew has 7 books.