May be helpful to your discussion. 7. Here's how Mo solved the subtraction problem

635 - 813:

635

- 813

- 222

Mo did this by working from right to left, saying

5 – 3 = 2

3 - 1 = 2

6 - 8 = -2

a. Is Mo's answer right?

b. Solve

6(100) + 3(10) + 5(1)

- [8(100) + 1(10) + 3(1)]

by working with expanded forms. Discuss how

Mo's work compares with your work in expanded

forms.

Mo's answer is wrong.

635 - 813

= -178

Step-by-step explanation:

a. Is Mo's answer right?

No, Mo's answer is incorrect

Mo did this by working from right to left, Just like Subtraction

• 3 - 5 =

We that 1 from the number in tens , add that to 3, making it 13

13 - 5 = 8

• 1 - 3 = 7

The one above becomes 0, because 1 was taken from it. We add 1 to 0, making it 10

10 - 3 = 7

• 8 - 6 = 1

The 8 above reduces to 7 because 1 has been taken from 8.

Hence: 7 - 6 = 1

635 - 813

= -178

The answer is minus 178 because, we are subtracting the bigger number form the smaller number.

b. Solve

6(100) + 3(10) + 5(1)

- [8(100) + 1(10) + 3(1)]

by working with expanded forms. Discuss how Mo's work compares with your work in expanded forms.

= -1(100) + 7(10) + 8(1)

24

step-by-step explanation:

if it takes 8 pounds to make 12 divide 12 by 8 and you get 1.5, 1.5 x 16 = 24