Borrow a friendly number, then put it back
Full educator lesson · Pupil invitation · Empty work mat · Optional home activity · Larger project · Written read-together script · Additive Work Bench
Child direction
Would moving to a nearby round number make this job easier? Pick one route. Show what the numbers mean, try a way, then check one result. You can stop after a useful part.
Purpose
Use exact compensation and distinguish it from estimation.
Complete fictional source
An invented sticker design has 398 blue stickers and 267 plain stickers. Find the exact total.
One own invitation
Work 299 + 146 exactly using a friendly number, and name the adjustment.
Access
Show, draw, type, sign, use your usual communication or direct an agreeing helper. Choose quiet/private work, switch a route, pause, pass or finish. One useful part is enough. A helper can read the exact words or scribe your choices; supplying an operation, count, regrouping or reason is mathematical help and is named. No speed, neatness, speech, handling or device requirement.
Routes
Id
A
Title
Puzzle pieces
Complete task
An invented puzzle tray joins 49 and 27 pieces. Use fifty carefully.
Entry or access
Draw the one added extra separately.
Access
Show, draw, type, sign, use your usual communication or direct an agreeing helper. Choose quiet/private work, switch a route, pause, pass or finish. One useful part is enough. A helper can read the exact words or scribe your choices; supplying an operation, count, regrouping or reason is mathematical help and is named. No speed, neatness, speech, handling or device requirement.
Id
B
Title
Sticker plan
Complete task
Find 398 + 267 and compare compensation with chunks.
Entry or access
Explain which quantity was changed.
Access
Show, draw, type, sign, use your usual communication or direct an agreeing helper. Choose quiet/private work, switch a route, pause, pass or finish. One useful part is enough. A helper can read the exact words or scribe your choices; supplying an operation, count, regrouping or reason is mathematical help and is named. No speed, neatness, speech, handling or device requirement.
Id
C
Title
Museum-copy game
Complete task
An imaginary exhibit game counts 1998 + 367 slips. Compare exact compensation and a nearest-hundred estimate.
Entry or access
This fictional game is not a museum programme or attendance fact.
Access
Show, draw, type, sign, use your usual communication or direct an agreeing helper. Choose quiet/private work, switch a route, pause, pass or finish. One useful part is enough. A helper can read the exact words or scribe your choices; supplying an operation, count, regrouping or reason is mathematical help and is named. No speed, neatness, speech, handling or device requirement.