Learn how to subtract 1, 10, or 100 from a number.
Subtracting 10s and 100s (no regrouping) is a free educational video by Khan Academy.It helps students in grades 2 practice the following standards 2.NBT.B.7.
1. 2.NBT.B.7 : Add and subtract within 1000, 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. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds..
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