Question

40 which expression shows a product of 63?
40 7 and 9 are a factor pair of 63 because 7 × 9 = 63.
40 complete the rest of the factor pairs of 63.
40 1 and ?
3 and ?

Explanation:

Step1: Find factor with 1

A factor pair multiplies to 63. For 1 and?, solve \(1\times? = 63\). So? = \(63\div1 = 63\).

Step2: Find factor with 3

For 3 and?, solve \(3\times? = 63\). So? = \(63\div3 = 21\).

Answer:

1 and 63; 3 and 21