Estimating
Estimate.
756 x 4
800 x 4 = 3,200
Model Using Partial Products.
2 x 23
2 x 23 = 46
Tens: 4
Ones: 6
Solve Using the Distributive Property.
27 x 5
(20 x 5) + (7 x 5) = y
100 + 35 = 135
The answer or result of a multiplication problem is the _______________.
Product
If I were estimating 2,331 x 5, would my estimation be greater than or less than my actual product?
2,000 x 5 = 10,000
Rounding Down -- LESS THAN
Model Using Partial Products.
2 x 43
2 x 43 = 86
Tens: 8
Ones: 6
Solve Using the Distributive Property.
32 x 7
(30 x 7) + (2 x 7) = y
210 + 14 = 224
A(n) ____________ is a number close to the exact value.
There are 62 rows of 9 chairs in the movie theatre. About how many chairs are there?
60 x 9 = 540 chairs
Model Using Partial Products.
4 x 12
4 x 12 = 48
Tens: 4
Ones: 8
Solve Using the Distributive Property.
55 x 6
(50 x 6) + (5 x 6) = y
300 + 30 = 330
A(n) __________________ of a number is the product of that number and any whole number.
Multiple
Estimate.
7 x 9,499
7 x 9,000 = 63,000
If I modeled 23 x 3 using partial products, how many tens would I have drawn?
23 x 3 = 69
Tens: 6
Solve Using the Distributive Property.
99 x 9
(90 x 9) + (9 x 9) = y
810 + 81 = 891
To _____________ is to use place value to exchange equal amounts when renaming a number.
Regroup
Kurt swims 575 yards each swim practice. If he practices Monday, Tuesday, and Thursday, about how many yards will he swim that week?
600 x 3 = 1,800 yards
If I modeled 8 x 12, how many ones would I have drawn BEFORE regrouping?
16
Solve Using the Distributive Property.
Mr. Mosby bought 4 boxes of paper. Each box contained 95 pieces of paper. How many sheets of paper did Mr. Mosby have in all?
4 x 95 = y
(4 x 90) + (4 x 5) = y
360 + 20 = 380 pieces of paper
The ___________________________ combines multiplication and addition by multiplying each addend by the number and adding the products.
Distributive Property