Posted by thomas on Wednesday, September 29, 2010 at 4:29pm.
complete to show how you can find the sum by making a ten, hundred, or thousand.
9+5=14
9+1+ blank
10+ blank
blank
90+50=140
90+10+blank
100+blank
blank
900+500=1400
900+100+blank
1000+blank
blank

3rd grade  bobpursley, Wednesday, September 29, 2010 at 5:10pm
9+5=14
9+1+4
10+4
14
same thing on the others, just add zeros

3rd grade  shivanie, Monday, September 10, 2012 at 6:47pm
how do u do it

3rd grade  Anonymous, Sunday, September 16, 2012 at 8:11pm
800+500=

3rd grade  Tare, Tuesday, September 10, 2013 at 8:34pm
800+500= 1,300
800+200+300
1000+300
1,300
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