Fact Families & Factors
If $7 \times 8 = 56$, what is $56 \div 7$?
8
Use "Friendly Numbers" to estimate 243 / 6.
About 40 (240 / 6)
In an Area Model, if Area = 60 and Width = 5, what is the Length?
12
What is 6.42 / 2?
3.21
21 students need a ride. Each car holds 4. How many cars are needed?
6 cars (You need an extra car for the 1 remaining student).
What are the Prime Factors of 12?
2x2x3
Estimate 197 / 0.5. Is the answer bigger or smaller than 197?
About 400; it is bigger (Dividing by a decimal < 1 increases the result).
Solve 135 / 5 by breaking 100 and 35 into "easy chunks.
27 (100 / 5 = 20; 35 / 5 = 7)
Solve 150 / 3 using an "extended fact."
50
Draw a picture to show 4 / (1/2)
8 (There are 2 "halves" in every whole).
Identify the "Fact Family" for the numbers 3, 5, and 15
3 x 5 = 15; 5 x 3 = 15; 15 / 3 = 5; 15 / 5 = 3
High-Low: Is 322 / 8 higher or lower than 40
Higher (8 x 40 = 320, and 322 is more).
Using "The Big 7" (Partial Quotients), solve 462 / 6.
77
Grade 6: Solve 4.62 / 6 using any strategy.
0.77
If a group of 4 students has a $100 budget, how much does each get?
$25 each
What is the prime factorization of 30?
2 x 3 x 5
Estimate 448 / 9 using a multiple of 9 that is close to 448.
About 50 (450 / 9)
Solve 462 / 6 using the standard algorithm (D-M-S-C-B).
77
Dividing a number by 0.1 is the same as multiplying it by what?
10
Grade 6: Calculate 3/4 of a $100 Science budget.
75
Create a Factor Tree for the number 72
2 x 2 x 2 x 3 x 3
You have 325 stickers for 11 friends. About how many does each get?
About 30 (330 / 11)
Solve 742 / 14 using the Area Model or Partial Quotients.
53
Solve 125 x 0.4. (Hint: 0.4 is 4 tenths).
50 (125 x 4 = 500, then adjust for tenths)
Solve 5 / (1/3). How many "one-third" pieces are in 5 wholes?
15