Students must use their addition and regrouping within 100 math skills to solve the case of the Angry Adder!
NEW - Editable Items list added to the packet. This way you can change the item names and alter the mystery outcome. There are also two alternative pre-made lists you can use instead. This is a great option if your students have already done this mystery story before and you need to change the mystery answer.
There are 5 clues to crack to solve the mystery:
Clue 1: Horizontal Addition (Within 20)
Clue 2: Adding Doubles (Few challenger questions at the end)
Clue 3: Addition Input/Output Tables (apply the rule given)
Clue 4: Addition Algorithms (Within 100 - No Regrouping)
Clue 5: Addition Algorithms (Within 100 - With Regrouping)
Pack also includes a mystery declaration sheet, answer sheets, elimination guide and awards.
CLICK HERE TO VIEW GRADE LEVELS AVAILABLE FOR THIS ADDITION MATH MYSTERY
See a list of all the Math Mysteries HERE
2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
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.