Author note — to cover

Converting both ways between ordinary numbers and A x 10 to the n with 1 at-most A < 10 and integer n, large and small; correcting near-misses like 34 x 10 to the 5; real contexts. Ordering and arithmetic live on the three sibling pages; calculator entry lives on calculator-standard-form. Both tiers. (N9)

• Fluency — direct questions on standard form, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).