Question

How can we re-write the expression below into “friendlier” terms? 6 ∙ 29

options:

6 ∙ (30 - 1)

6 ∙ (16 + 13)

6 ∙ (19 + 10)

6 ∙ (21 + 8)

Answer 1

Option A: 6 ∙ (30 - 1)

Solution:

Given expression is 6 · 29.

Friendlier term means a number can be expressed using other numbers which are closest to the number.

Option A: 6 ∙ (30 - 1)

30 is closest to 29, so which is the friendlier term to 29.

6 · 29 = 6 ∙ (30 - 1)

Option B: 6 ∙ (16 + 13)

16 and 13 are not closest to 29, which are not the friendlier terms.

Option C: 6 ∙ (19 + 10)

19 and 10 are not closest to 29, which are not the friendlier terms.

Option D: 6 ∙ (21 + 8)

21 and 8 are not closest to 29, which are not the friendlier terms.

Hence Option A: 6 ∙ (30 - 1) is the correct answer.