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Item description

This CSI themed Math Mystery activity will engage students by taking them on a journey to solve problems and puzzles. Students narrow down the suspects by completing the activities and marking them off from the suspect list until one person is left. The problems in this math mystery focus on mentally adding and subtracting within 20 along with adding and subtracting single digit problems to 2 digit numbers.

 

This case includes

Clue 1: Using addition within 20 using mental strategies.

Clue 2: Comparing bigger and smaller two digit numbers.

Clue 3: Using addition and subtraction within 20 using mental strategies.

Clue 4: Taking 1-digit away from a 2-digit Subtraction with no regrouping.

Clue 5: Making 20 though addition.

 

Answer sheets are included

 

Thank you

Kiwiland