Avoid using a calculator; use your brain instead.
The Question
.
.
.
.
.
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The Answer
50 + 10 x 0 + 7 + 2 =
50 + 0 +7 + 2 =
50+ 7 + 2 =
59
By DIY zone
The Question
.
.
.
.
.
The Answer
50 + 10 x 0 + 7 + 2 =
50 + 0 +7 + 2 =
50+ 7 + 2 =
59