New Zealand Curriculum: Level 2 to Level 3
Learning Progression Frameworks: Additive Thinking, Signpost 6 to Signpost 7
These activities are intended for students who understand place value with two- and three-digit numbers but are not yet able to use this knowledge to solve addition and subtraction problems. While these activities assume students know most of their addition and subtraction basic facts (number bonds to 20), some students may need support to revise or develop these. For students who are not yet able to use place value to solve two-digit addition and subtraction problems see Using whole number place value for two-digit addition and subtraction.
The following diagnostic problems indicate students’ understanding of, and ability to use, place value to add and subtract whole numbers to three places. The problems are presented in order of complexity. Avoid asking a problem if the student has found the previous problem difficult. (show diagnostic questions)