Grade Level: 3rd Skill: Problem Solving Topic: Give Clear Evidence for Your Answer Goal: Express the solution clearly and logically by using the appropriate mathematical notation and terms and clear language; support solutions with evidence in both verbal and symbolic work. Skill Description: Mathematical Reasoning: mathematical notation, logic, problem solving The ability to show the answer (and how he/she got there) clearly in pictures or words. The ability to properly label answers in writing.

### Sample Problems

 (1) One way to write an addition problem is this way: 6 + 9 = (15). Can you write it in another format? Line up the numbers carefully! 6 + 9 15 (2) Rewrite this problem as you did above: 21 + 36 = (57) (When rewriting make sure the 1, 6, and 7 are aligned in a vertical column; then the 2, 3, and 5 align in the tens column) (3) Draw a picture to illustrate how you will solve this problem and then solve it. Be sure you label your answer. Six friends play hide and seek. Jack is the seeker. One friend hides behind the big oak tree and two others hide behind the house. Jack is in front of the house and sees the rest of the group trying to run away. How many people does Jack see running away? How many legs does he see running? (2 kids are running; 4 legs…unless he sees his own and counts those, too=6) (4) Solve this problem. Be sure that your digits are aligned correctly: 45 x 2 (90) (5) Cole and Jaspar go surfing and each catch four waves all the way to shore. Two of them were caught going to the left and two to the right. Jaspar wiped out on two more and never made it to shore on those. Cole caught three more, but jumped off his board before making it to shore. How many waves did both boys catch all the way to shore? (8)

### Online Resources

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