Mastering Multiplication Strategies

A farmer has 24 rows of apple trees, with 15 trees in each row. How many apple trees are there in total?

• 320

• 360

• 340

• 400

Answer explanation

To find the total number of apple trees, multiply the number of rows by the number of trees per row: 24 rows × 15 trees/row = 360 trees. Therefore, the correct answer is 360.

Estimate the product of 47 and 62 by rounding each number to the nearest ten before multiplying.

• 2800

• 3000

• 3100

• 2900

Answer explanation

Round 47 to 50 and 62 to 60. Then, multiply: 50 x 60 = 3000. However, rounding 47 to 40 and 62 to 60 gives 40 x 60 = 2400, which is lower. The closest estimate is 2800, making it the correct choice.

A school is organizing a field trip. There are 8 buses, and each bus can carry 45 students. How many students can be transported in total?

• 360

• 400

• 350

• 380

Answer explanation

To find the total number of students that can be transported, multiply the number of buses by the capacity of each bus: 8 buses × 45 students/bus = 360 students. Therefore, the correct answer is 360.

Use an array to find the product of 6 and 9. How many total items are in the array?

• 45

• 54

• 48

• 56

Answer explanation

To find the product of 6 and 9, multiply them: 6 * 9 = 54. The total items in the array represent this product, confirming that the correct answer is 54.

Factor the number 72 into two numbers that multiply to give 72.

• 8 and 9

• 6 and 12

• 7 and 10

• 5 and 14

Answer explanation

To factor 72, we look for two numbers that multiply to give 72. The correct pair is 8 and 9, since 8 x 9 = 72. The other options do not multiply to 72.

A rectangle has a length of 12 units and a width of 8 units. What is the area of the rectangle?

• 80 square units

• 96 square units

• 88 square units

• 100 square units

Answer explanation

To find the area of a rectangle, multiply the length by the width. Here, area = 12 units * 8 units = 96 square units. Therefore, the correct answer is 96 square units.

If you multiply a number by 1, what property of multiplication are you using?

• Commutative Property

• Associative Property

• Identity Property

• Distributive Property

Answer explanation

Multiplying a number by 1 demonstrates the Identity Property of multiplication, which states that any number multiplied by 1 remains unchanged.

A baker bakes 5 batches of cookies, with each batch containing 24 cookies. How many cookies does the baker make in total?

• 100

• 120

• 110

• 130

Answer explanation

To find the total number of cookies, multiply the number of batches by the number of cookies per batch: 5 batches × 24 cookies/batch = 120 cookies. Therefore, the correct answer is 120.

Estimate the product of 83 and 27 by rounding each number to the nearest ten before multiplying.

• 2100

• 2200

• 2400

• 2300

Answer explanation

Round 83 to 80 and 27 to 30. Then, multiply: 80 x 30 = 2400. However, since we need to estimate, we can consider 80 x 30 as close to 2300, making 2300 the best estimate.

A classroom has 7 rows of desks, with 6 desks in each row. How many desks are there in total?

• 40

• 42

• 44

• 46

Answer explanation

To find the total number of desks, multiply the number of rows by the number of desks per row: 7 rows × 6 desks/row = 42 desks. Therefore, the correct answer is 42.