how does drawing a picture help us solve multi-digit multiplication? 368 x 7 =
TRANSCRIPT
How does drawing a picture help us solve multi-digit multiplication?
368 x 7 =
In this lesson, you will learn how to multiply a 3 digit number by a 1 digit number… by drawing an area model
to organize your thinking.
Let’s ReviewLet’s ReviewLet’s ReviewLet’s Review 27 x 4 =
4
20 7+
4 x 20= 4 x 7=80 28
4 x 20= 804 x 7= 28+4 x 27=108
Let’s ReviewLet’s ReviewLet’s ReviewLet’s Review 368 x 7 =
368 = 300+60 + 8
Expanded Notation
A Common MistakeA Common MistakeA Common MistakeA Common Mistake
300 x 7 =2,1003.
Multiplication
60 x 7 =4202.8 x 7= 561.
Addition
300 x 7 =2,1001.60 x 7 = 4202.
8 x 7= 563.
7
300 + 60 + 8368 x 7 =
Core LessonCore LessonCore LessonCore Lesson 368 x 7 =
7
300 + 60 + 8300 x 7 =2,100 60 x 7 = 4208x7=56
300 x 7 =2,10060 x 7 = 420+
360 x 7 =2,520
360 x 7 =2,520
360
Core LessonCore LessonCore LessonCore Lesson 368 x 7 =
7
+ 88x7=56
+
360 x 7 =2,520
360 x 7 =2,520
8 x 7 = 56
368 x 7 =2,576
360
Core LessonCore LessonCore LessonCore Lesson 368 x 7 =
7
+ 8
368 x 7 =2,576
+
360 x 7 =2,5208 x 7 = 56
368 x 7 =2,576
2,576
360 368
In this lesson, you have learned how to multiply a 3 digit number by a 1 digit number… by drawing an area model to organize your thinking.
Guided PracticeGuided PracticeGuided PracticeGuided Practice
6
400 + 50 + 7
400 x 6 =2,400 50 x 6 = 3007x6=42
457 x 6 =
400 x 6 =2,40050 x 6 = 300
7x6=5650 x 6 = 3007 x 6= 56+
457 x 6 =2,756
457 x 6 =2,756
2,756
Extension ActivitiesExtension ActivitiesExtension ActivitiesExtension Activities
?
? + ? + ?
243 x 8 =Label the diagram below to solve the
problem:
Extension ActivitiesExtension ActivitiesExtension ActivitiesExtension Activities
Label the diagram below, then write the number sentences in the areas for:
?
? + ? + ?
243 x 8 =
? x ? =? ? x ? = ? ?x?= ?
Quick QuizQuick QuizQuick QuizQuick Quiz
Which number sentence is not a way to name 275 ?
275 = 200 + 70 + 5A.
275 = 200 + 75B.275 = 270 + 5C.
275 = 275 + 70 + 5D.
Quick QuizQuick QuizQuick QuizQuick Quiz Which diagram is not correctly naming: ?275 x 3 =
3
275 + 70 + 5
200 x 3 =825 70x3=210 5x3=15
A.
3
200 + 70 + 5
200 x 3 =600 70x3=210 5x3=15
B.
3
270 + 5
270 x 3 =810 5x3=15
C.
3
200 + 75
200 x 3 =600 75x3=225
D.