# Math Word Problems: Addition & Multiplication Calculator

> Model a common groups-times-items-plus-extra word problem.

Page: https://askcalculators.com/calculator/math-word-problems-addition-and-multiplication-calculator/
Definition: https://askcalculators.com/calculator/math-word-problems-addition-and-multiplication-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/math-word-problems-addition-and-multiplication-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/math-word-problems-addition-and-multiplication-calculator/?groups=8&itemsPerGroup=12&extraItems=5

## Inputs
- groups: Number of groups; type=number; required; default=8; min=0
- itemsPerGroup: Items per group; type=number; required; default=12; min=0
- extraItems: Extra items added; type=number; required; default=5

## Outputs
- total: Total items; format=number; primary
- equation: Equation; format=text
- multiplicationSubtotal: Groups subtotal; format=number

## Formula
total = groups × items per group + extra items

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.