A purpose for roundingYear 4 Maths · T2 W11–12 · Supplementary / Next22

Access

Read or sign the exact source and prompts neutrally, enlarge them, or scribe the learner’s chosen words. A figure, operation, regrouping, equation role or check supplied by an adult is mathematical help and is recorded as such. Show, draw, type, sign or use usual communication. One component can be enough; pause/pass/finish are choices. Four own spaces are genuinely empty. Models, criteria and next lessons stay on separate staff pages.

Complete different guided source

A pretend AUD plan costs $247 and $138, budget $390.

Complete new source

A fictional AUD plan has costs $176 and $158, budget $340.

Complete own invitation

An invented AUD plan costs $298 and $207, budget $500.

Entry and teach

Place 176 between 170/180 and 158 between 150/160; round nearest ten.

Guided instruction

About 250+140≈390; exact 385, 5 left. Invite each relationship before the answer; teach missing facts and name help.

Id

NEXT22

Materials

Broad paper/empty bar or line/place-value headings as useful; usual communication; no actual stock/handling/purchase.

Observe and follow up

Receive one available own relationship before staff possibility. If it matches criterion, offer another small new context later; this is not automatic mastery. If not, return to the entry relationship and fade one hint. Record the actual mathematical help. If access/time is not available, change access or sitting rather than marking wrong.

Relationship to check

Teach the observed missing relationship in a new ordinary domain; not an answer repetition or further held item.

Session sequence

1. Read the new source and name units/wanted quantity. Place 176 between 170/180 and 158 between 150/160; round nearest ten.

2. Model on separate adult paper. About 180+160≈340 checks scale; exact 334 must settle a fit.

3. Guide a different complete source. A pretend AUD plan costs $247 and $138, budget $390. About 250+140≈390; exact 385, 5 left.

4. Receive one own attempt. An invented AUD plan costs $298 and $207, budget $500. Staff reference only: About 300+210≈510; exact 505, 5 over.

5. Compare available work with: Nearest-ten values and approximation limitation are stated, not called exact cost. Choose one follow-up offer; never infer independence from a copied model.

What to look for

Nearest-ten values and approximation limitation are stated, not called exact cost.

Staff own possibility

About 300+210≈510; exact 505, 5 over.

Teacher model

About 180+160≈340 checks scale; exact 334 must settle a fit.

Timing

An adjustable 10–20 minute ordinary lesson, unpiloted; split/stop after one useful part.

Title

A purpose for rounding