They want the answer steps more than the final number. If your formula is correct, you get marks even with a calculation slip—they call it error carried forward. But forget units or put too many digits, and they'll cut half a mark without a blink. My coaching sir says it's the discipline of science, like sharpening a chisel cleanly. Every Sunday test, I see my rank change over those tiny deductions, like watching wooddust pile up from a careless cut.
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