# Friendly-number puzzle set


## 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.

## Day

53

## Id

X03

## Notice

Ordinary larger optional project, 20–40 minutes or several sittings unpiloted; not proof practical making, independence or whole code attainment.

## Numbered moves


1. Read the complete fictional source; name wanted quantity and units. Select a representation after checking the day entry.

2. Make a source/problem/strategy note. Work the stated problem on own paper or usual communication.

3. Compare with a separate adult possibility only after available own work: 455 and 545.

4. Build the intended tangible note/puzzle/gallery or exact description. Create a pair of puzzles showing extra 2/extra 1 and their removal; include exact answers on separate adult key.

5. Try a different stated condition if wanted. Label the first and changed version separately; keep/check/change/pause/finish are choices.

## Purpose

Create a pair of puzzles showing extra 2/extra 1 and their removal; include exact answers on separate adult key.

## Routes


1. 
### Instruction

State quantities and try one operation with smaller whole counts. Keep actual mathematical help visible.

### Name

One useful component


2. 
### Instruction

Create a pair of puzzles showing extra 2/extra 1 and their removal; include exact answers on separate adult key.

### Name

A note another maker can read


3. 
### Instruction

Select one count to change by 10–50 while keeping nonnegative values. State all new conditions, compute and check; an uncomputed change is a plan.

### Name

A second version


## Complete source

Invented totals are 198+257 and 399+146.

## Title

Friendly-number puzzle set

## After own work: adult practice possibility

455 and 545.