homework_remembering_te_grade_4-1zwawpi

2-2
Name
Date
Solve each problem.
1. 10 × 3 = 3 tens 2. 10 × 6 tens = 6 hundreds, or 600
Follow the directions.
3. Divide the 30 × 40 rectangle into 10-by-10 squares
of 100 to help find the area.
30
=
40 =
10
+
10
+ 10 +
10
10
10 × 10 = 100
10 × 10 = 100
10 × 10 = 100
10 × 10 = 100
10
+
+
10
10 × 10 = 100
10 × 10 = 100
10 × 10 = 100
10 × 10 = 100
10
+
+
10
10 × 10 = 100
10 × 10 = 100
10 × 10 = 100
10 × 10 = 100
10
© Houghton Mifflin Harcourt Publishing Company
10 + 10 + 10 +
4. Complete the steps to factor the tens.
30 × 40 = ( 3 × 10) × ( 4 × 10)
= ( 3 × 4 ) × (10 × 10)
= 12 × 100
= 1,200
5. What is the area of the 30 × 40 rectangle, in square units?
1,200 square units
10
UNIT 2 LESSON 2 Connect Place Value and Multiplication 31