<p> Formative Instructional and Assessment Tasks</p><p>NBT Task 5a Domain Number and Operations in Base Ten Cluster Use place value understanding and properties of operations to add and subtract. Standard(s) 1.NBT.6 Subtract multiples of 10 (from 10-90) from multiples of 10 (from 10-90), using concrete models or drawings, and strategies based on place value, properties of operations, and/or relationship between addition and subtraction; explain the reasoning used. Materials SF, cubes or counters, ten frames, pencil Task Provide materials to the student. Read the problem to the student: The clown had 70 balloons. He gave away 30 balloons. How many balloons does the clown have now? Show your thinking with pictures, words, or numbers.</p><p>Continuum of Understanding Developing  Solves the problem incorrectly. Strategy(is) Used: Understanding  Solves the problem correctly, but relies on counting all or  Counting All counting on.  Counting On  Solves the problem correctly, but does not show strategies  Makes Tens with pictures, numbers, or words.  Basic Facts Complete  Clearly explains the correct answer, showing use of  Creates easier or Understanding strategies other than counting on or counting by ones. known sums  Doubles  Doubles +/- 1, 2  Other:</p><p>Standards for Mathematical Practice 1. Makes sense and perseveres in solving problems. 2. Reasons abstractly and quantitatively. 3. Constructs viable arguments and critiques the reasoning of others. 4. Models with mathematics. 5. Uses appropriate tools strategically. 6. Attends to precision. 7. Looks for and makes use of structure. 8. Looks for and expresses regularity in repeated reasoning.</p><p>NC DEPARTMENT OF PUBLIC INSTRUCTION FIRST GRADE</p>