Success criteria
- I can record partial products or division steps clearly.
- I can divide by a two-digit divisor and report a remainder.
- I can use an estimate to decide whether the quotient is plausible.
Explain
Break 347 × 26 into 347 × 20 and 347 × 6. For division, estimate first. Explain how multiplying the quotient back by the divisor helps verify the result.
Independent practice
Calculate 347 × 26.
Use the compatible numbers 9,600 ÷ 30 to estimate 9,417 ÷ 32.
Find the whole-number quotient of 9,417 ÷ 32.
What is the remainder?
Transfer
A printer packs 9,417 cards into boxes of 32. State how many full boxes it fills, how many cards remain, and whether another box is needed for shipping. The context determines what the remainder means.
Delayed check
After four days, calculate 428 × 37 and 7,508 ÷ 24 with an estimate and inverse-operation check.
Evidence and next step
Save the full written algorithms—not only answers—at jeremy/portfolio/math/unit-2/multiplication-division.md.
- Accurate method, estimate, and contextual remainder → continue.
- Correct answer but unreadable steps → redo one with labelled partial products.
- Estimate and exact answer disagree greatly → diagnose before moving on.