Grade 3
Virginia Math Standard: 3.CE.1
The student will estimate, represent, solve, and justify solutions to single-step and multistep problems, including those in context, using addition and subtraction with whole numbers where addends and minuends do not exceed 1,000.
How Many Ways: Add to 170
Four blanks, ten digits, one target. Students hunt for every pair of two-digit numbers that adds to 170 without repeating a digit, then work out why there are only four.
Broken Calculator: 2-Digit Subtraction
This calculator gets subtraction wrong the same way every time. Can your students crack its broken rule?
Math Curiosity: Magic Squares
Imagine a 3×3 square in which every row, column, and diagonal have the same sum. That’s a magic square!