Subtraction Using an Abacus

Select a problem set using the buttons above, then use your
mouse or tab key to select a question. Fill in the blank
with the correct answer for each problem. When you have
answered all of the questions, ask Charlie how you did.

Use the abacus worksheet to perform each subtraction operation.
Be sure to use commas where appropriate.

57,286 - 12,083 =

43,000 - 14,307 =

18,000 - 13,996 =

45,885 - 16,999 =

985,992 - 343,998 =

257,142 - 251,318 =