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
16001100=500
1600500=1100
Is that correct? Please help.Thank you.

math3rd grade  Joshua, Wednesday, October 15, 2008 at 5:10pm
Hi elaine,
Yup, that is all correct. Well done!

math3rd grade  Joshua, Wednesday, October 15, 2008 at 5:12pm
Oops, missed out some equations
such as
500 + 1600,
sorry about that

math3rd 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..

math3rd grade  blanca, Thursday, November 13, 2008 at 1:53am
give three numbers that make each statement true.
1. 12+(?) is greater than 20.

math3rd 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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