1.nbt.4 Worksheets

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Previous Standard Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
Next Standard Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
Number and Operations in Base Ten Use place value understanding and properties of operations to add and subtract. 4Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.