Domain Number and Operations in Base Ten

Cluster Use place value understanding and properties of operations to add and subtract.

Standard Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

1.NBT.C.5

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

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Number Square

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