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).
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 3rd pineapple from the left (as per workbook).
Solution: Look at the picture for the solution
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.
Solution: Look at the picture for the solution.
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.