In this test, 2nd grade students will practice subtracting different two-digit numbers by employing a variety of strategies such as: using models to regroup and find differences, writing subtraction problems vertically, and using addition to check the answer of a subtraction problem.

This quiz has ten problems: six multiple choice, three drag and drop items, and one matching problem.

Second grade students will use place value and properties of operations to subtract two-digit numbers (with and without regrouping.) Some problems are written horizontally, some vertically, and one problem has a model with base ten blocks.

This test is based on the following Common Core Math Standards:

**CCSS.Math.Content.2.NBT.B.5**

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

**CCSS.Math.Content.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.

**CCSS.Math.Content.2.NBT.B.9**

Explain why addition and subtraction strategies work, using place value and the properties of operations

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