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Every page on SumStreak.

Play

• Daily sprint: today's 20 problems, the same for everyone
• Practice: a fresh set whenever you like, without touching your streak
• How to play: the rules, the grid and the streak

Guides

• Mental math tricks: Simple mental math tricks for each operation: add left to right, subtract by counting up, multiply by splitting, divide by thinking in times tables. With worked examples.
• Get faster at mental math: How to improve your mental arithmetic speed: learn the facts to recall, find your slowest operation, practise a few minutes every day, and track your time per problem.
• Times tables practice: A times table chart up to 12 × 12 with the hardest facts highlighted, tricks for each table, how to use tables for division, and multiplying past 12 in your head.
• The daily math game: SumStreak is a free daily math game for adults and students: one timed sprint of 20 arithmetic problems a day, the same for everyone, with a shareable result grid and a streak.

Problem sets

• All problem sets: Free printable arithmetic worksheets with answer keys: 2- and 3-digit addition and subtraction, multiplication facts, division, and mixed mental math questions.
• 2-digit addition: 30 two-digit addition problems with an answer key, from 11 + 11 up to 99 + 99. Print them as a worksheet or time yourself doing them in your head.
• 3-digit addition: 30 problems adding a two-digit number to a three-digit one, like 347 + 68, with an answer key. Printable, and made for mental math practice.
• 2-digit subtraction: 30 two-digit subtraction problems with an answer key, many with borrowing. Print them or solve them in your head against the clock.
• 3-digit subtraction: 30 problems taking a two-digit number from a three-digit one, like 412 − 76, with an answer key. Printable mental math practice.
• Multiplication facts: 30 times tables questions from 2 × 2 to 12 × 12 with an answer key. A printable multiplication facts quiz for building recall speed.
• 2-digit × 1-digit multiplication: 30 problems multiplying a two-digit number by a one-digit one, like 17 × 6 and 28 × 7, with an answer key. Printable mental math practice.
• Division facts: 30 division facts like 72 ÷ 8 and 132 ÷ 11, all within the 12 times tables, with an answer key. A printable division quiz.
• Dividing by 1-digit numbers: 30 problems dividing two- and three-digit numbers by a one-digit number, like 156 ÷ 6, each with a whole-number answer. Printable, with an answer key.
• Dividing by 2-digit numbers: 30 problems dividing by a two-digit number, like 161 ÷ 23, each with a single-digit answer. Printable mental division practice with an answer key.
• Mixed mental math: 30 mixed mental math questions, addition, subtraction, multiplication and division, getting harder as they go, with an answer key. Printable.

About the site

• FAQ: Answers about SumStreak: is it free, what's in each daily sprint, how the score and streak work, what the colours mean, and how to delete your data.
• About & contact: SumStreak is a free daily mental math sprint: 20 timed arithmetic problems a day, the same for everyone. Contact us at [email protected].
• Privacy: What SumStreak collects and why: your daily times, an optional nickname, and, only if you sign in, your Google name and email.
• Terms: The terms for using SumStreak: a free daily mental math game in your browser, with an optional account and a public leaderboard.