Understanding Decimal Multiplication

The video tutorial explains how to solve problems involving multiplication of decimals. It starts with a problem about comparing the weight of two dogs, using estimation to predict the result and then performing the calculation. The tutorial emphasizes understanding the placement of decimals. A second example involves calculating the distance traveled by a scooter, reinforcing the concept of decimal multiplication and estimation.

What is the weight of How's dog if it is 3.4 times the weight of James's dog, which weighs 2.6 kg?

• 8.84 kg

• 9.04 kg

• 8.64 kg

• 9.24 kg

If you multiply 345 by 26 without considering decimals, what is the product?

• 9000

• 8900

• 8700

• 8970

Tags

CCSS.5.NBT.B.7

Where should the decimal be placed in the product of 3.45 and 2.6 to make sense of the estimation?

• Between 9 and 10

• Between 7 and 8

• Between 8 and 9

• Between 6 and 7

Tags

CCSS.5.NBT.B.7

What is the reasoning behind placing the decimal in the product of 3.45 and 2.6?

• To ensure the result is between 8 and 10

• To ensure the result is between 6 and 12

• To ensure the result is between 4 and 8

• To ensure the result is between 10 and 14

Tags

CCSS.6.NS.B.3

What is the product of 3.45 and 2.6 when calculated without decimals?

• 8700

• 9000

• 8900

• 8970

Tags

CCSS.6.NS.B.3

How long does Ben ride his electric scooter if he travels at 9.3 km/h for 1.2 hours?

• 11.16 km

• 10.16 km

• 12.16 km

• 9.16 km

Tags

CCSS.5.NBT.B.7

What is the estimated product of 1.2 and 9.3?

• Around 15

• Around 13

• Around 9

• Around 11

Tags

CCSS.4.NBT.B.5

If you multiply 12 by 93 without considering decimals, what is the product?

• 1126

• 1136

• 1116

• 1106

Tags

CCSS.5.NBT.B.7

Where should the decimal be placed in the product of 1.2 and 9.3 to make sense of the estimation?

• Between 9 and 10

• Between 10 and 11

• Between 12 and 13

• Between 11 and 12

Tags

CCSS.6.NS.B.3

What is the product of 1.2 and 9.3 when calculated without decimals?

• 1116

• 1106

• 1126

• 1136

Tags

CCSS.6.NS.B.3