# Both sides mean the same amount


## Child direction

Make a puzzle another person can check without guessing what the equals sign means. Pick one route. Show what the numbers mean, try a way, then check one result. You can stop after a useful part.

## Purpose

Find an unknown when each side contains a calculation.

## Complete fictional source

An invented display equation is 245+□=390+75. Find the box value and check both sides.

## One own invitation

Solve 128+□=200+47 and check the two sides.

## 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 equality puzzle

### Complete task

Solve 18+□=25+7, preserving both sides.

### Entry or access

Represent each entire side as a whole.

### 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

Display equation

### Complete task

Use 245+□=390+75. Create a readable substitution check.

### Entry or access

No balance-scale physical claim is needed.

### 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

Archive equality

### Complete task

Solve 2000−675=□+486. Show what is known first.

### Entry or access

Use a broad labelled two-side diagram.

### 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.