Instructions: Use associative and distributive properties as well as estimation to compute products of multi-digit numbers.
Topic A: Lessons 1-2
5.NBT.1, 5.NBT.A.2
Question 1
1.
Use mental math and your knowledge of the distributive and associative properties of multiplication to solve.
30 x 500 =
(Type the answer only. Do NOT re-type the question)
Question 2
2.
700 x 400 =
Question 3
3.
60 x 500 =
Question 4
4.
4,000 x 90 =
Question 5
5.
130 x 300 =
Question 6
6.
4,300 x 40 =
Question 7
7.
2,600 x 50 =
Question 8
8.
70 x 320 =
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
Question 13
13.
Question 14
14.
Question 15
15.
Tickets to a concert are $30 for adults and $20 for children. There are 50 adults and 80 children attending the concert. How much money will they all pay? Show your work.
Round the factors to find the closest estimate.
4,897 x 77
5,000 x 80 = 400,000
4,000 x 80 = 320,000
5,000 x 70 = 350,000
5,000 x 80 = 300,000
Round the factors to find the closest estimate.
6,840 x 35
7,000 x 30 = 210,000
6,000 x 30 = 180,000
7,000 x 40 = 280,000
6,000 x 40 = 240,000
The estimated answer to a multiplication problem is 800,000. Which of the following expressions could result in this answer?
8,146 x 10
8,146 x 109
81,467 x 109
81,477 x 1,109
Round the factors and estimate the product:
9,832 x 39
10,000 x 30 = 300,000
9,000 x 40 = 360,000
9,000 x 30 = 270,000
10,000 x 40 = 400,000
For which expression would 300,000 be a reasonable estimate?
3,246 x 13
32,465 x 132
3,426 x 132
32,465 x 1,325
Round each factor, then find the estimated product.
582 x 23 ≈ ____________ x _______________ = _______________
Drag and drop from left to right to show your answers.
You will only use three of the answer choices on the left.