Mastering Decimal Addition Techniques

The video tutorial explains how to correctly add two decimal numbers, 9.087 and 15.31. It begins by encouraging viewers to attempt the problem independently. The instructor then highlights common mistakes, such as misaligning decimal places, which can lead to incorrect results. The correct method involves aligning the decimal points to ensure proper addition of corresponding place values. The tutorial proceeds with a detailed, step-by-step demonstration of the addition process, emphasizing the importance of starting from the smallest place value and carrying over when necessary. The final result of the addition is 24.397.

What are the two numbers we are trying to add in this problem?

• 9.087 and 14.31

• 8.097 and 15.31

• 9.087 and 13.51

• 9.087 and 15.31

Tags

CCSS.6.NS.B.3

Why is it important to align the decimals when adding two numbers?

• To make the numbers look neat

• To avoid carrying over values

• To ensure the place values are correctly aligned

• To make the addition faster

Tags

CCSS.5.NBT.B.7

What mistake might you make if you don't align the decimals properly?

• Adding thousandths to hundredths

• Adding ones to tens

• All of the above

• Adding tenths to ones

Tags

CCSS.5.NBT.B.7

What is the first step in aligning the decimals for the numbers 9.087 and 15.31?

• Align the decimal points

• Add zeros to the numbers

• Write 9.087 first

• Write 15.31 first

Tags

CCSS.6.NS.B.3

What should you do if there are no thousandths in one of the numbers?

• Skip the addition

• Add a one in the thousandths place

• Ignore the thousandths

• Add a zero in the thousandths place

Tags

CCSS.5.NBT.B.7

What is the sum of 7 thousandths and 0 thousandths?

• 1 thousandth

• 7 thousandths

• 0 thousandths

• 7 hundredths

Tags

CCSS.5.NBT.B.7

What is the result of adding 8 hundredths and 1 hundredth?

• 8 tenths

• 7 hundredths

• 10 hundredths

• 9 hundredths

Tags

CCSS.5.NBT.B.7

What do you get when you add 9 ones and 5 ones?

• 10 ones

• 13 ones

• 14 ones

• 15 ones

Tags

CCSS.2.NBT.B.6

What is the next step after getting 14 ones in the addition process?

• Subtract 1 from 14

• Ignore the extra 1

• Carry over 1 to the tens place

• Write 14 as it is

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the final result of adding 9.087 and 15.31?

• 24.397

• 24.307

• 24.3970

• 24.390

Tags

CCSS.6.NS.B.3