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Math · Adding and subtracting

Big Number Bakery: Two-digit adding and subtracting with regrouping

Two-digit numbers are boxes of 10 cupcakes plus loose ones. Adding past 9 ones packs a new box, and subtracting can mean opening one. A tens-and-ones column sheet shows the worked steps, so carrying and borrowing make sense before they're a rule.

  • Grades2nd grade
  • Levels5, from “Add, no new box” to “Mixed”
  • A roundAbout 10 questions, a few minutes
  • PriceWith any plan, from $7.99 a month
Try it free for 7 daysSee plans and prices
A round of Big Number Bakery on a phone

How Big Number Bakery works

The 5 levels

  1. Add, no new box
  2. Add and make a box
  3. Subtract, no opening
  4. Subtract and open a box
  5. Mixed

What it lines up with in school

Common Core State Standards for Mathematics. Standards vary by state, so check with your kid’s teacher.

2.NBT.B.5
Add and subtract within 100 fluently using place value.

Practice it at home

Questions about Big Number Bakery

What grade is Big Number Bakery for?
2nd grade. It’s a regrouping game with 5 levels that move up when your kid is ready.
Which standards does Big Number Bakery cover?
It lines up with Common Core math 2.NBT.B.5. Standards vary by state, so check with your kid’s teacher for the exact match.
Does my kid need to read to play Big Number Bakery?
Big Number Bakery doesn’t read its questions aloud yet. Questions are short and built on pictures and numbers, so most kids in 2nd grade can play on their own.
How long is a round of Big Number Bakery?
About 10 questions, a few minutes. Nine right on the first try and the next round is a level harder; a tough round steps back one.
Is Big Number Bakery free?
It comes with every plan, from $7.99 a month, with a 7-day free trial. Number Garden and Gator Compare are free.

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