# Lesson 10

Using Long Division

Let’s use long division.

### Problem 1

Kiran is using long division to find \(696 \div 12\).

A:

Hundreds

B:

Tens

C:

Ones

D:

Tenths

### Problem 2

Here is a long-division calculation of \(917 \div 7\).

- There is a 7 under the 9 of 917. What does this 7 represent?
- What does the subtraction of 7 from 9 mean?
- Why is a 1 written next to the 2 from \(9-7\)?

### Problem 3

Han's calculation of \(972 \div 9\) is shown here.

- Find \(180 \boldcdot 9\).
- Use your calculation of \(180 \boldcdot 9\) to explain how you know Han has made a mistake.
- Identify and correct Han’s mistake.

### Problem 4

Find each quotient.

### Problem 5

One ounce of a yogurt contains of 1.2 grams of sugar. How many grams of sugar are in 14.25 ounces of yogurt?

A:

0.171 grams

B:

1.71 grams

C:

17.1 grams

D:

(From Unit 5, Lesson 7.)
171 grams

### Problem 6

The mass of one coin is 16.718 grams. The mass of a second coin is 27.22 grams. How much greater is the mass of the second coin than the first? Show your reasoning.