Question

Add the following using suitable rearrangements:

$21+22+23+24+25+75+76+77+78+79$

Answer 1

Explanation:

Using distributive property of whole number using addition we know that the order of the terms does not effect the final answer

so, putting $(21,79),(22,78),(23,77),(24,76),(25,75)$ together

we get

$$\begin{gathered} (21+79)+(22+78)+(23+77)+(24+76)+(25+75) \\ =100+100+100+100+100 \\ =500 \end{gathered}$$

Hence, after applying distributive property of whole number over addition we will get $500$.