# 3rd grade

WHAT ARE PARTIAL SUMS???

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asked by KATELYN
1. It is a method of addition, without regrouping (carrying).

for instance

459
164 add
add the 400 and 100 hundreds
500
add the 50+ 60
110
add the 9+4
13
now add those
(right to left)
643
http://www.nychold.com/em-arith.html

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2. grade 1 215
grade 2 186
grade 3 259
how many more were sold bt grade 3 than by grade 2? 73 answer

why aren't any of the tens regrouped to subtract the ones?

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posted by jordan

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