3-30 Using Friendly Numbers to Subtract

Last updated about 4 years ago

3 questions

3

2.NBT.B.8

3

2.NBT.B.8

4

2.NBT.B.8

Subtract 1 from 21 to make a friendly number. https://talkandcomment.com/p/cfd779885ec4e12fda42ea50 (voice note)

A.  20

B.  22

C. 19

D.  573

A.  575

B.  572

C.  573

D. I don't know. 

A.  573 - 19 = 554

B.  573 - 20 = 553

C.  573 - 21 = 552

D.  575 - 20 = 555

Subtract 1 from 21 to make a friendly number. https://talkandcomment.com/p/cfd779885ec4e12fda42ea50 (voice note)

A.  20

B.  22

C. 19

D.  573

Since you took 1 away from 21, we need to take 1 away from 574. What is 574 - 1 = ?https://talkandcomment.com/p/3700766119a390b26a0e47fd (voice note)

A.  575

B.  572

C.  573

D. I don't know. 

A.  573 - 19 = 554

B.  573 - 20 = 553

C.  573 - 21 = 552

D.  575 - 20 = 555