Multiplying 2-Digit by 1-Digit Numbers

The video tutorial teaches students how to multiply a two-digit number by a one-digit number using real-life examples. It covers both multiplication without regrouping and with regrouping. The examples include calculating the number of students in buses, chocolates in boxes, biscuits in packets, and pages in books. The tutorial emphasizes writing numbers in columns and performing multiplication in steps, highlighting the importance of regrouping when necessary.

If one school bus can carry 21 students, how many students can three buses carry?

• 42

• 84

• 105

• 63

Tags

CCSS.3.OA.A.3

What is the first step in multiplying 21 by 3?

• Multiply 3 by 2 tens

• Write the numbers in rows

• Multiply 3 by 1 ones

• Add the products

Tags

CCSS.4.NBT.B.5

What is the result of multiplying 21 by 3?

• 73

• 63

• 53

• 42

Tags

CCSS.4.NBT.B.5

How many chocolates are there in four boxes if each box contains 60 chocolates?

• 240

• 180

• 300

• 120

Tags

CCSS.3.OA.A.3

What is the first step in multiplying 60 by 4?

• Multiply 4 by 6 tens

• Multiply 4 by 0 ones

• Add the products

• Write the numbers in rows

Tags

CCSS.4.NBT.B.5

How many biscuits are there in five packets if each packet contains 34 biscuits?

• 160

• 170

• 180

• 150

Tags

CCSS.3.OA.A.3

What is the first step in multiplying 34 by 5?

• Add the products

• Write the numbers in rows

• Multiply 5 by 4 ones

• Multiply 5 by 3 tens

Tags

CCSS.4.NBT.B.5

What is the result of multiplying 34 by 5?

• 150

• 160

• 170

• 180

Tags

CCSS.4.NBT.B.5

How many pages are there in three books if each book has 99 pages?

• 270

• 280

• 290

• 300

Tags

CCSS.4.NBT.B.5

What is the first step in multiplying 99 by 3?

• Multiply 3 by 9 tens

• Multiply 3 by 9 ones

• Add the products

• Write the numbers in rows

Tags

CCSS.4.NBT.B.5