ข้อสอบสิงคโปร์ Singapore Mathematics Primary 4 พร้อมเฉลย

ข้อสอบสิงคโปร์ Singapore Mathematics Primary 4

First Semestral Assessment

1. There were 1 200 chairs in the hall. Mr Ang arranged them into 3 rows. There were 605 more chairs in the first row than the second row. The number of chairs in the second row was thrice the number of chairs in the third row. How many chairs were there in the second and third row?

2. Joel and Zhi Rui had $2 896. After Joel gave Zhi Rui $128, he still had $86 more than Zhi Rui. How much money did Zhi Rui have at first?

3. Shawn donated-1/4 of his allowance to charity and spent another 1/4 of his allowance on a toy car. He had $36 left.
a) What fraction of the allowance had he left?
Give you answer in the simplest form.
b) Howmuch money did he donate to charity?

Answer:

1) 1200 - 605 = 595

lu-»595 / 7 = 85

85 x 4 = 340

There were 340 chairs in 2nd and 3rd rows.

2) 2896 - 86 = 2810

l -> 2810 / 2 = 1405

1405 - 128 = $1277

Zhi Rui had $1277 at first.

3) a) 1/4 = 2/8

2/8 + 2/8 = 4/8

8/8 - 4/8 = 4/8 = 2/4 = Vz

He had left with Vz of his allowance.

b) lu->36/4 = 9

9x2 = $18

He donated $18 to charity.