Question$$\begin{array}{l} \text { recall } 7 \times 6 \\ 5 \times 6= \\ 2 \times 6=1 \\ 7 \times 6=1 \end{array}$$
22. Communicate and Justify To he recall $3 \times 9$ automatically, would a 2s fact or a 5 s fact you know?
Ascssment Pricite $\qquad$
24. If you know that $5 \times 9=45$ and $1 \times$ what operation should you use to fi $6 \times 9 ?$ 4ka21

Studdy Solution
Use the known facts to compute the result: $$6 \times 9 = 5 \times 9 + 1 \times 9 = 45 + 9 = 54.$$
Solution: For the first question: To recall $3 \times 9$ automatically, you could use either a 2s fact or a 5s fact. - Using a 2s fact, $3 \times 9 = 2 \times 9 + 1 \times 9 = 18 + 9 = 27$. - Using a 5s fact, $3 \times 9 = 5 \times 9 - 2 \times 9 = 45 - 18 = 27$. The choice depends on which set of facts (2s or 5s) the student finds easier to recall.
For the second question: To find $6 \times 9$ using the known facts $5 \times 9 = 45$ and $1 \times 9 = 9$, you should use addition: $$6 \times 9 = 5 \times 9 + 1 \times 9 = 45 + 9 = 54.$$