&&66
,QWHUSUHWSURGXFWVRIZKROHQXPEHUVHJLQWHUSUHW[DVWKH
NS 3.1*2$
Use repeated
addition, arrays, counting by multiples to do
WRWDOQXPEHURIREMHFWVLQJURXSVRIREMHFWVHDFK)RUH[DPSOHGHVFULEHDFRQWH[WLQ
multiplication.
ZKLFKDWRWDOQXPEHURIREMHFWVFDQEHH[SUHVVHGDV[
UNDERLYING SKILLS AND CONCEPTS:
repeated addition;
model numbers
Use Multiplication Arrays
You can use arrays to show multiplication.
a
K
ey Ide
E x am p l E
How many squares are there in all?
There are 2 rows of squares.
There are 5 squares in each row.
You can multiply.
Look!
The rows are equal.
The columns
are equal.
B – © CSL Associates, Inc. All rights reserved.
2 ! 5 " 10 squares in all
Chapter 15 – Lesson 4
page 177
Name
P RAC T I C E
Look at each picture.
1
How many rows?
_____
How many in each row? _____ How many in all?
_____
2
How many rows?
_____
How many in each row? _____ How many in all?
_____
3
888
3 8 24
4
22222
5 2 10
5
4444
4 4 16
6
6666
4 6 24
Math
Reasoning
Number Sense
MR 1.2
Draw an array. Solve.
7
Shawna had some dimes.
She made stacks of 10.
She made 4 stacks.
How many dimes did Shawna have?
40 dimes
Check that students have shown equal rows and
equal columns.
page 178
Chapter 15 – Lesson 4
B – © CSL Associates, Inc. All rights reserved.
Write a multiplication sentence. Multiply.
Name
P RAC T I C E
Look at each picture.
1
How many rows?
_____
How many in each row? _____ How many in all?
_____
2
How many rows?
_____
How many in each row? _____ How many in all?
_____
3
8888
4 8 32
4
2222
428
5
44444
5 4 20
Math
Reasoning
Number Sense
MR 1.2
Draw an array. Solve.
6
Kristen had some nickels.
She made stacks of 10.
She made 5 stacks.
How many nickels did Kristen have?
page 120
50 nickels
Home Resource and Homework
Chapter 15 Lesson 4
B – © CSL Associates, Inc. All rights reserved.
Write a multiplication sentence. Multiply.
MCX94TEG2Ch01_30.v9.4.1 2/19/01 19:49 Page 327
Name
P RAC T I C E
Look at each picture.
1
3
How many rows?
_____
3
6 6
How many in each row? _____
18
18
How many in all?
_____
2
How many rows?
_____
2
2
How many in each row? _____
9 9
18
How many in all?
_____
18
B – © CSL Associates, Inc. All rights reserved.
Write a multiplication sentence. Multiply.
3
888
3 8 24
4
22222
5 2 10
5
4444
4 4 16
6
6666
4 6 24
Math
Reasoning
Number Sense
MR 1.2
Draw an array. Solve.
7
Shawna had some dimes.
She made stacks of 10.
She made 4 stacks.
How many dimes did Shawna have?
40 dimes
Check that students have shown equal rows and
equal columns.
Chapter 15 – Lesson 4
Student Book Page
page 178
Name
P RAC T I C E
Look at each picture.
1
4
How many rows?
_____
4
6 6
How many in each row? _____
24
24
How many in all?
_____
2
How many rows?
_____
3
3
How many in each row? _____
9 9
27
How many in all?
_____
27
3
8888
4 8 32
4
2222
428
5
44444
5 4 20
Math
Reasoning
Number Sense
MR 1.2
Draw an array. Solve.
6
Kristen had some nickels.
She made stacks of 10.
She made 5 stacks.
How many nickels did Kristen have?
page 120
50 nickels
Home Resource and Homework
Chapter 15 Lesson 4
B – © CSL Associates, Inc. All rights reserved.
Write a multiplication sentence. Multiply.