5、? The lower left corner is correct.
6、⑴42,
⑵ 18,
⑶ 1
The sum of 14 and 2 1 is a mul
5、? The lower left corner is correct.
6、⑴42,
⑵ 18,
⑶ 1
The sum of 14 and 2 1 is a multiple of 7.
The sum of 18 and 27 is a multiple of 9.
Both addends are multiples of a certain number, so sum is also a multiple of this number.