MCQ
Find the missing values: $571 + (...... + 394) = (..... + 429) + 394$
- A$571, 394$
- ✓$429, 571$
- C$571, 429$
- D$429, 394$
Addition is associative for whole numbers
i.e. $a + (b + c) = (a + b) + c$
$\therefore 571 + (429 + 394) = (571 + 429) + 394$
$\therefore$ The missing terms are $429, 571.$
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