Question

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

Answer 1

9+5=14
9+1+4
10+4
14
same thing on the others, just add zeros

Answer 2

how do u do it

Answer 3

800+500=

Answer 4

800+500= 1,300
800+200+300
1000+300
1,300