We are given a multiple-choice math test and are asked to solve the problems. We will solve each problem and select the correct answer. Let's work through each question.

1. Problem Description

We are given a multiple-choice math test and are asked to solve the problems. We will solve each problem and select the correct answer. Let's work through each question.

2. Solution Steps

Question 1:

Multiply 142709 by

3. $142709 \times 3 = 428127$

The answer is B. 428

1

2

7.

Question 2:

Evaluate the expression $109000 \times 6 + 891000 \times 6$.

We can factor out the 6 to simplify the expression:

$6 \times (109000 + 891000) = 6 \times 1000000 = 6000000$

The answer is C. 6 000

0

0

0.

Question 3:

A store receives 30 boxes of oranges, each weighing 25 kg. The store sold 3 ta 25 kg of oranges. We need to find how many kg of oranges are left. Note that 1 ta = 100 kg, so 3 ta = 300 kg.

The total weight of oranges received is $30 \times 25 = 750$ kg.

The store sold $300 + 25 = 325$ kg.

The amount of oranges remaining is $750 - 325 = 425$ kg.

The answer is C. 425 kg.

Question 4:

We need to find the smallest result among the given expressions.

A. $13 \times 12 = 156$

B. $3675 : 35 = 105$

C. $11 \times 21 = 231$

D. $1386 : 14 = 99$

The smallest result is

9

9. The answer is D. 1386:

1

4.

Question 5:

A school has 5 grades, each with 5 classes. They collected 1200 notebooks to send to underprivileged children. What is the average number of notebooks per class?

Total number of classes is $5 \times 5 = 25$.

The average number of notebooks per class is $1200 / 25 = 48$.

The answer is B. 48 quyển.

Question 6:

In a box there are 3 blue balls and 1 yellow ball. We take one ball out and observe its color. What event cannot happen?

Since there are only blue and yellow balls, it's impossible to get a pink ball.

The answer is D. Rô – bốt lấy được quả bóng màu hồng.

Question 7:

This question is incomplete.

Question 8:

A box contains 5 cards with the numbers 1, 2, 3, 4,

5. We randomly draw one card. Which of the following outcomes cannot occur? Since there are only the number 1, 2, 3, 4, 5 written in the card, the number 6 cannot be on the card selected.

The answer is D. 6

Question 9: Calculate the following:

$190215 \times 7 = 1331505$

$2154 \times 25 = 53850$

$787236 : 6 = 131206$

$9030 : 42 = 215$ (approximately)

3. Final Answer

1. B. 428 127

2. C. 6 000 000

3. C. 425 kg

4. D. 1386:14

5. B. 48 quyển

6. D. Rô – bốt lấy được quả bóng màu hồng

7. Incomplete Question.

8. D. 6

Calculations:

$190215 \times 7 = 1331505$

$2154 \times 25 = 53850$

$787236 : 6 = 131206$

$9030 : 42 = 215$ (approximately)