Estimation and Number Theory

3 is a common factor of 24 and _____

Jim has 36 boxes. Each holds 5 beads. About how many beads does Jim have in all?

What is the closest estimate of 67 x 3?

Which is the closest estimate of 84 x 9?

The fifth multiple of 9 is?

Tim has $1,256. The tv he wants is $$2,895. About how much more does he need to buy the tv?

Which of the statements is incorrect?

Steve had $2,894. The leather couch cost $5,387. About how much more does he need to buy it?

Look at the array. What is 5 rows of 16?

62 people waiting to ride a train. Each train has 6 cars. About how many on each car?

Tim has 48 boxes with 7 erasers in each box. About how many erasers does he have in all?

45 students planned to go to the movies. Each ticket costs $7. If 8 students did not go, about how much was the cost?

Which is the closest estimate to 73 x 6?

Tom sold 36 apples in week 1, 58 apples in week 2, and 42 in week 3. About how many apples did Tom sell?

Kyle has 1,786 shells. Joan has 2,345. About how many shells do they have to the nearest 100?

What is the product of 32 x 7?

_____ is the product of 47 x 8.

Which of the following statements is incorrect?

From the area model, what is the product of 28 x 6?

Which statement is incorrect?

There are 3 vans are taking students to the field trip. If 34 students are going, about how many will be on each van?

What are the factors of the number 6?

Which shows a way to multiply 7 x 35?

Which is the closest estimate of 86 x 7?

Name a common multiple of 6 and 8 that is between 40 and 50.

Jim has 39 boxes of rings. Each box holds 4 rings. About how many rings does Jim have?

6 is a common factor of 24 and _______.