Multiplication Patterns
4×300=
1,200
45,000 ÷ 9
500
810 ÷ 9
90
Estimate using compatible numbers
352 ÷ 7 is about
50
Solve for the quotient
1,200 ÷ 3
400
9×8,000=
72,000
20,000 ÷ 5
400
Use rounding to estimate the product 6×479. Round 479 to the nearest hundred.
3,000
Use compatible numbers to estimate the quotient.
1,765÷6
300
Use mental math to find the quotient of
450÷5=
90
The school uses the money they raised to buy 3 new basketball hoops. Each hoop costs $600.
What is the cost for the 3 hoops?
1,800 hoops
600 paper clips
Use rounding to estimate the product 8×1,659. Round 1,659 to the nearest thousand
16,000
Myra works 78 hours over 4 weeks. She estimates how many hours she works each week.
80 ÷ 4 = 20
Myra says she works about 20 hours each week.
Do you agree?
Yes.
Myra rounded 78 to 80 which is correct. Then she divided 80 by 4 and got 20.
Use mental math to solve for the product.
6 X 80
560
What is the basic math fact in this equation?
5,000 X 6
5 x 6
Ari has 2,000 marbles. He puts the same number of marbles in each of 5 bags. How many marbles are in each bag?
400 Marbles
Greta has 3 rolls of ride tickets for the carnival. Each roll has 64 tickets. She says that she has 192 tickets.
Is the answer reasonable?
Yes 3 × 60 = 180, which is close to 192. The answer is reasonable.
The quotient 1,880 ÷ 4 is between which two numbers?
400 and 500
Use the distributive property to solve
Find 9 × 16.
9 x 10=90
9 x 6 = 45
90+45=135
so 9 x 16=135
The fourth grade class is selling pencils for a school fundraiser. The pencils come in boxes of 4,000 pencils. If 5 boxes of pencils are sold, how many pencils did the fourth grade class sell?
20,000 Pencils
Two friends split a $2,000 prize. How much money do they each get?
$1,000
Identify the two thousands that 3,217 is between. Using those numbers, find two estimates that the product 9×3,217 is between.
27,000 and 36,000
Lazy Daze Summer Camp has tents that each fit 5 campers. The camp director says that they need 78 tents for 290 campers.
Is this reasonable? Use estimation to justify your answer.
No
290 is close to 300 and 300 ÷ 5 =60
78 tents is too many.
Solve this using mental math and distributive property
4 X 46
4 x 40= 160
4 x 6= 24
160 + 24=184
4 x 46=184