Simplify Strategy Multiples of Ten:
70 = 7 x ______
10
100
Write in unit form:
80
8 tens
100
Draw an area model to solve (write answer in standard form):
20 x 30
Show Teacher
2 tens x 3 tens = 6 hundreds = 600
100
Write in expanded form
1,587
1,000 + 500 + 80 + 7
100
Solve with Partial Products:
222
x 2
--------
222
x 2
--------
4
40
+ 400
--------
444
200
Simplify Strategy Multiples of Ten:
50 = _____ x ______
5 x 10
200
Write and solve in unit form
30 x 20
3 tens
x 2 tens
_______
6 hundreds
200
Draw an area model to solve (write answer in standard form):
40 x 50
Show teacher
4 tens x 5 tens = 20 hundreds = 2,000
200
Solve with an area model
2 x 487
Show your teacher
(2 x 400) + (2 x 80) + (2 x 7) =
(800) + (160) + (14) = 974
200
Solve with partial products
345
x 2
--------
345
x 2
--------
10
80
+ 600
---------
690
300
Simplify Strategy Multiples of Ten:
120 = ____ x _____
12 x 10
300
Write and solve in unit form:
40 x 80
4 tens
x 8 tens
-----------
32 hundreds
300
Draw an area model to solve (write answer in standard form):
70 x 40
Show teacher
7 tens x 4 tens = 28 hundreds = 2,800
300
Solve with an area model:
3 x 249
Show your teacher
(3 x 200) + (3 x 40) + (3 x 9) =
(600) + (120) + (27) = 747
300
Solve with partial products
692
x 4
---------
692
x 4
---------
8
360
+2400
---------
2768
400
Simplify Strategy Multiples of Ten:
50 x 30 = (_____ x ______) x (_____ x _____)
(5 x 10) x ( 3 x 10)
400
Write and solve in unit form:
300 x 30
3 hundreds
x 3 tens
------------------
9 thousands (9,000)
400
Solve with an area model.
The turkeys decided to create an ambush for the farmer before thanksgiving. There were 90 turkeys, and each one set up 20 traps. How many traps did they all set for the farmer?
Show teacher
9 tens x 2 tens = 18 hundreds = 1,800
400
Solve with an area model
3 x 1,234
Show your teacher
(3 x 1,000) + (3 x 200) + (3 x 30) + (3 x 4) =
(3,000) + (600) + (90) + (12) = 3,702
400
Solve with Partial Products
The turkeys made a daring escape the night before thanksgiving. They grabbed 3 cars and 325 turkeys escaped in each car. How many turkeys got away?
325
x 3
--------
15
60
+ 900
---------
975
500
Simplify Strategy Multiples of Ten:
600 = (_____ x _____ x ______)
6 x 10 x 10
500
Write and solve in unit form
500 x 500
5 hundreds hundred = 100 (moves two places)
x 5 hundreds hundred = 100 (moves two places)
----------------- ten thousand = 10,000 (moves 4 places)
25 ten thousands
(25,000)
500
Solve with an area model.
There were 60 boxes of 40 pumpkins. It takes 2,300 pumpkins to make enough pie for the town party. Do they have enough pumpkins?
Yes.
6 tens x 4 tens = 24 hundreds = 2,400.
They will even have an extra 100 pumpkins.
500
Solve with an area model
5 x 3,456
Show your teacher
(5 x 3,000) + (5 x 400) + (5 x 50) + (5 x 6) =
(15,000) + (2,000) + (250) + (30) = 17,280
500
Solve with partial products
Tony and Tina decided to build 3 leaf piles to jump in. Oddly enough, they ended up with 892 leaves in each pile. How many leaves were in both piles?