Singapore Math Level 2A & 2B – Final Review: Mental Calculations, Money, Fractions, Time, Volume, Graphs, Lines, Surfaces, Shapes and Patterns - 25 Questions

Admin SMB

13 February

FINAL REVIEW: MENTAL CALCULATIONS, MONEY, FRACTIONS, TIME, VOLUME, GRAPHS, LINES, SURFACES, SHAPES AND PATTERNS

Fill in each blank with the correct answer.

Solution(1):

5 of the figure is shaded.

2. The below chart graph shows the number of eggs James sold in a week.

Each 🥚 stands for 10 eggs.

Sunday: 🥚🥚🥚🥚🥚🥚🥚

Monday: 🥚🥚🥚🥚

Tuesday: 🥚🥚🥚

Wednesday: 🥚🥚

Thursday: 🥚🥚🥚🥚🥚

Friday: 🥚🥚🥚🥚🥚🥚

Saturday: 🥚🥚🥚🥚🥚🥚🥚🥚

(a) He sold __ eggs on Thursday.

(b) He sold __ eggs on Sunday.

(d) He sold __ fewer eggs on Tuesday than on Saturday.

(e) He sold __ eggs altogether on Monday and Wednesday.

Solution(2):

(a) 50

[5 × 10 = 50]

(b) 70

[7 × 10 = 70]

[Monday → 4 × 10 = 40;

Friday → 6 × 10 = 60;

60 – 40 = 20]

(d) 50

[Tuesday → 3 × 10 = 30;

Saturday → 8 × 10 = 80;

80 – 30 = 50]

(e) 60

[Monday → 4 × 10 = 40;

Wednesday → 2 × 10 = 20;

40 + 20 = 60]

3. The time shown on the clock is 11:50 A.M. 30 minutes later, it will be ___.

Solution(3):

11:50 + 0:30 = 12:20

30 minutes after 11:50 A.M. is 12:50 P.M.

4. Shade ¼ of each figure.

Answer(4):

Each figure given in this question and its ¼ shaded part are given below.

[Note: The first figure is divided into 4 parts and the second figure into 8 parts; Accordingly, 4×¼=1 of the first figure; 8×¼=2 of the second figure will be shaded.]

Solution(5):

1L+1L=2L

∵ 1 jug can hold 2 L of water.

3×2L=6L

∵ Container A can hold 6 L of water.

6. Complete the pattern.

Completed Pattern:

7. Add 790 and 70 mentally.

Solution(7):

790 + 100 = 890;

890 – 30 = 860

8. ²/₅ and ___ make one whole.

Solution(8):

1 – ²/₅

= ⁵/₅ – ²/₅

= ³/₅

So, ²/₅ and ³/₅ make one whole.

9. Draw the minute hand on the clock to show 6:40 P.M.

Solution(9):

10.

figure made of a semicircle and a rectangle

Answer: The figure on the right is made of a semicircle and a rectangle.

11. Look at the figures carefully.

Figure ___ does not belong in the group.

Answer(11): C

[²/₄ of Figure C is shaded, while ¹/₄ of the rest of the figures are shaded.]

12.

△ × △ = 100

◯ × ◯ = 25

△ × ◯ = ?

Solution(12):

△ × △ = 100

∵ △ = 10

◯ × ◯ = 25

∵ ◯ = 5

∵ △ × ◯ = 10 × 5 = 50

13. ¹/₁₀ + ⁴/₁₀ + ²/₁₀ = ?

Solution(13):

¹/₁₀ + ⁴/₁₀ + ²/₁₀

1 +4 +2

= ----------------

= ⁷/₁₀

14. The figure below is made of 4 different shapes. Draw dotted lines to show the shapes.

Solution(14):

The given figure and the picture where dotted lines are drawn to show the shapes are as follows:

15. Find the largest fraction.

¹/₁₂, ¹/₉, ¹/₁₁

Solution(15):

9 < 11 < 12

¹/₉is the largest.

16. $48.30 = ____ dollars and ____ cents.

Answer(16):

$48.30 = 48 dollars and 30 cents.

17. Subtract 90 from 345 mentally.

Solution(17):

345 – 100 = 245

245 + 10 = 255

18. Express 9,080¢ in dollars.

Solution(18):

9,080 cents

= (9080 ÷ 100) dollars

= 90.80 dollars

19. Subtract ²/₁₁ from ⁵/₁₁.

Solution(19):

⁵/₁₁- ²_/11

5-2

= --------

= ³/₁₁

Solve the following story problems. Show your work in the space below.

20. Alice spent $30 at the supermarket. Sydney spent twice as much as Alice. How much did Sydney spend?

Solution(20):

$30 + $30 = $60

Sydney spent $60.

21. Patrick gave 5 cans of juice to each of his 7 friends. How many cans of juice did he give to his friends?

Solution(21):

7 × 5 = 35

He gave 35 cans of juice to his friends.

22. 3 groups of students took part in an art competition. There were 129 students in Group A, 257 students in Group B, and 229 students in Group C. How many students took part in the art competition?

Solution(22):