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1
667+=733
2
463+=515
3
435+=516
4
788+=852
5
709+=761
6
216+=294
7
740+=839
8
414+=473
9
152+=180
10
889+=949
11
978+=1003
12
195+=222
13
632+=723
14
639+=722
15
858+=890
16
615+=660
17
852+=926
18
749+=767
19
773+=832
20
737+=836
Answer key
What is in this set
The numbers in this set run from 107 to 1,077.
Every problem in it will need a borrow from the column to the left.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: the two numbers on the page were added — a missing part is found by taking one away from the total, not by adding.
Answers are a whole number.
Drawing 240 problems from this page produced 238 different ones, 99% — so a sheet of 20 is a new sheet almost every time.
We would put this in front of a grade 3 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.