For questions 1-3, find the unknown numbers that make the number sentences true.
10
10
10
10
10
10
10
10
From EngageNY.org of the New York State Education Department. Grade 2 Mathematics Module 1, Topic A, Lesson 2. Internet. Available from https://www.engageny.org/resource/grade-2-mathemat...; accessed 20/July/2015.