Posted by **elaine** on Wednesday, October 15, 2008 at 5:09pm.

Write the +/- family for:500, 1100, 1600.

What do i do?

1100+500=1600

500+1100=1600

1600-1100=500

1600-500=1100

Is that correct? Please help.Thank you.

- math-3rd grade -
**Joshua**, Wednesday, October 15, 2008 at 5:10pm
Hi elaine,

Yup, that is all correct. Well done!

- math-3rd grade -
**Joshua**, Wednesday, October 15, 2008 at 5:12pm
Oops, missed out some equations

such as

500 + 1600,

sorry about that

- math-3rd grade -
**Joshua**, Wednesday, October 15, 2008 at 5:17pm
together with 1100 + 1600, 1100 - 500, and I'm not sure if you also want to include those with negative answers..

- math-3rd grade -
**blanca**, Thursday, November 13, 2008 at 1:53am
give three numbers that make each statement true.

1.- 12+(?) is greater than 20.

- math-3rd grade -
**Matthew**, Tuesday, January 13, 2009 at 9:07pm
Explain your thinking. Use the digits 1, 3, 4, 5, 7, and 9 to write two money amounts that you can subtract by trading 1 dollar for 10 dimes. Then solve.

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