Problem
Only 6 times itself makes 36 among one-digit numbers.
Among one-digit numbers, only 6 times itself makes 36 — six equal groups of six really do add up to 36.
3.OA.A.4Eliminate PossibilitiesMultiplication FactsThe circle stands for the number 6.
The circle multiplied by itself equals 36, and among the single-digit numbers only 6 does that.
Six equal groups of six add up to 36, so 6 times 6 really makes 36.
Multiplying every other single-digit number by itself and comparing the totals, none but 6 reaches exactly 36.
▲ × 6 = 48, so ▲ is 8.
The missing factor of 48 with 6 is 8 — a basic multiplication fact you already know.
3.OA.A.4Eliminate PossibilitiesMultiplication Facts1▲ is 18, so ■ × 2 = 18 gives ■ = 9; adding the three gives 23.
Doubling to reach 18 needs 9, and adding the three found values gives the total.
3.OA.D.8Guess And CheckMultiplication FactsSolve the equation that pins one shape down first, then the rest fall into place.