# An estimate helps. An exact check decides.


## Child direction

Pick a made-up supply or budget job. What decision does the arithmetic need to answer? Pick one route. Show what the numbers mean, try a way, then check one result. You can stop after a useful part.

## Purpose

Formulate additive practical problems and interpret exact comparisons.

## Complete fictional source

A fictional print stand needs 485 handouts. It has 268 in one pile and 124 in another. Is there enough? Separately a pretend art plan has costs $265 and $148, within an invented AUD450 budget.

## One own invitation

Budget $300, fictional costs $148 and $153. Does it fit? Give an exact reason.

## 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


1. 
### Id

A

### Title

Small card order

### Complete task

An invented set needs 90 cards; there are 47 and 36. Find whether more are needed.

### Entry or access

Use whole counts rather than a purchase.

### 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.


2. 
### Id

B

### Title

Art budget

### Complete task

Use fictional $265+$148 and $450 budget. State total cost and money left.

### Entry or access

No real cash handling or spending follows.

### 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.


3. 
### Id

C

### Title

Close print decision

### Complete task

An invented print target is 2000 sheets, with 987+1018 available. Estimate then decide exactly.

### Entry or access

Compare a rough equality with exact five-extra.

### 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.