Let’s do it step by step.

Expression: 100 − 40 ÷ 2 + 10

First the division:

40 ÷ 2 = 20

Now put it back:

100 − 20 + 10

Solve from left to right:

100 − 20 = 80
80 + 10 = 90

Final answer: 90

 

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