Add Two-digit Number to a Multiple of Ten Worksheet

Objective:
To practice these math problems of 1NBTC4 worksheets, students are required to add a two-digit number to a one-digit number and a two-digit number to a multiple of ten (within 100). Use concrete models, drawings, strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to explain the reasoning used. Users can directly refer the answer key to verify the work with steps for the corresponding practice problems given in the 1.NBT.C.4 activities under the domain number and operations in base 10 in common core state standards for 1st grade mathematics. The main objective of these 1.NBT.C.4 practice problems and answers is to make students to understand how to (1NBTC) Use place value understanding and properties of operations to add and subtract.