Singapore Math Level 2A & 2B – Mid-Review: Numbers, Adding, Subtracting, Multiplying, Dividing
Friends, a summary question covering what we’ve learned from Unit 1 to Unit 9 has been included in this exercise. Let’s take a moment to review what we’ve covered so far.
1. Number 1 – 1000
2. Adding and subtracting numbers 1 – 1000 and it’s model
3. Multiplying and dividing numbers 2, 3, 4, 5 and 10 and it’s model
4. Length and mass with models
So let’s solve the Mid-Review of Singapore Math Level 2A & 2B.
[Note: Some questions in this section have been modified and changed but the solution process has been kept unchanged.]
Fill in each blank with the correct answer.
1.
(a) Ribbon B is ___ in. long.
(b) Ribbon C is ____ in. long.
(c) Ribbon D is _____ in. long.
(d) Ribbon E is ______ in. long.
(e) The total length of ribbons A and C is _______ in.
(f) Arrange the ribbons in order. Begin with the longest.
Solution:
(a) B = 11 – 3 = 8
Ans: 8
(b) C = 7 – 2 = 5
Ans: 5
(c) D = 11 – 2 = 9
Ans: 9
(d) E = 15 – 5 = 10
Answer: 10
(e) A = 8 – 1 = 7; C = 7 – 2 = 5 ;
A+C = 7 + 5 = 12.
Answer: 12
(f) E, D, B, A, C
2.
Solution:
The mass of the rabbit is 18 kg.
3. Write the number in words on the line.
647 _____________________.
Solution:
six hundred and forty-seven
4. Arrange the following numbers in order. Begin with the smallest.
Solution:
303, 330, 405, 415, 540
5. The product of 3 & 9 = ?
6. The sum of 237 & 508=?
7. The difference between 717 & 169=?
8. 10 more than 590 = ?
9. 120 is 10 less than _________.
Solution:
5. 3 × 9 = 27
6. 237 + 508 = 745
7. 717 – 169 = 548
8. 10 + 590 = 600
9. 120 + 10 = 130
10. Write 2 multiplication and 2 division sentences also by using the pictures below.
Solution:
6 × 2 = 12
2 × 6 = 12
12 ÷ 6 = 2
12 ÷ 2 = 6
11. Complete the number pattern.
660, ____, 700, 720, ______
Solution:
660, 680, 700, 720, 740
12. Divide 24 bees into 4 equal groups.
24 ÷ _____=______
There are ___ bees in each group.
Solution:
24 ÷ 4 = 6
There are 6 bees in each group.
Fill in each blank with the correct answer.
13.
(a) 105 cm + 68 cm = ______
(b) 32 lb. – 16 lb. = _______
(c) _________ × 3 = 24
(d) 612 + 258 = _________
(e) 300 – 125 = ___________
Solution:
(a) 105cm+68cm=173cm
(b) 32lb-16lb=16lb
(c) 8×3=24
(d) 612+258=870
(e) 300-125=175
Write the correct answers on the lines.
14. The data below shows the different colors of art papers sold by a shopkeeper in a week.
| red | 315 |
| yellow | 197 |
| white | 280 |
(a) How many fewer yellow art papers were sold than white ones?
(b) How many red and white art papers were sold altogether?
Solution:
(a) 280 – 197 = 83
So, 83 fewer yellow art papers were sold than white ones.
(b) 315 + 280 = 595
So, 595 red and white art papers were sold altogether.
15. Omar wants to buy a remote-controlled airplane. It costs $65, but he has only $49. How much more money does he need?
Solution:
$65 – $49 = $16
Omar need $16 more.
16. Imani used 185cm of cloth to sew some cushion covers. She used 275cm of cloth to sew blankets. How much cloth did she use altogether?
Solution:
185 + 275 = 460
Imani used 460cm cloth altogether.
17. Michael has 35 baseball cards. He gives an equal number of cards to 5 baseballers. How many cards does each baseballer get?
Solution:
35 ÷ 5 = 7
Each baseballer get 7 cards.
18. Mei baked 460 cat biscuits on Sunday. She baked 150 fewer biscuits on Monday.
(a) How many cat biscuits did she bake on Monday?
(b) How many cat biscuits did she bake altogether?
Solution:
(a) 460 – 150 = 310
Mei baked 310 cat biscuits on Monday.
(b) 460 + 310 = 770
She baked 770 cat biscuit altogether.
19. James plants 3 rows of cacti in his garden. There are 7 cacti in each row. How many cacti does he plant altogether?
Solution:
3 × 7 = 21
James plants 21 cacti altogether.
20. Vivian walks 150 yd. from her house to a store. She then walks another 180 yd. to a playground. How far does Vivian walk in all?
Solution:
150 + 180 = 330
Vivian walks 330 yd. in all
Solve the following story problems. Show your work in the space below. Draw the appropriate models.
21. Dakota has 5 mangoes. Each mango has a mass of 10 g. What is the total mass of the 5 mangoes?
Solution:
5 × 10 = 50
The mass of the 5 mangoes is 50 g.
22. Mrs. Coleman collected 32 pages of exam-paper from a group of students. Each student turned in 4 pages. How many students did Mrs. Coleman collect the pages from?
Solution:
32 ÷ 4 = 8
Mrs. Coleman collected the pages from 8 students.
23. Hannah receives a daily allowance of $2. How much money does she receive from Tuesday to Saturday?
Solution:
5 × $2 = $10
She receives $10 from Tuesday to Saturday.
24. 3 boys shared a piece of cloth equally. The length of the total cloth was 9 yd. What was the length of cloth received by each boy?
Solution:
9÷3=3
The length of cloth received by each boy was 3 yd.
25. A painter needs 4 days to paint a wall. How many days does he need to paint 3 walls?
Solution:
3 × 4 = 12
He needs 12 days to paint 3 walls.
