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Arithmetic ability: level three: mental addition of four-digit numbers.

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4216 + 3761 =

8986 + 4710 =

5169 + 9400 =

6167 + 6433 =

2297 + 9078 =

2989 + 4307 =

9734 + 3829 =

5239 + 9697 =

4412 + 9783 =

4713 + 8229 =

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© Oleg Akvan
metodorf.com



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