JPEN

Subtraction Challenge

Subtraction 20

20 problems in a row. Go for it!

Progress
1234567891011121314151617181920
Time00:00
Mistakes0
Problem 414 - 6 =
Problem 520 - 8 =
Problem 613 - 5 =
Problem 717 - 8 =
Problem 816 - 7 =
Problem 1019 - 6 =
Problem 1110 - 9 =
Problem 1212 - 7 =

Solve a series of subtraction problems. Each mistake adds 3 seconds to your time.

Choose how many problems you want to challenge, then click Start. The game begins after the countdown!Choose how many problems you want to challenge, then tap Start. The game begins after the countdown!

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