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Ok, so 3 and 4/10 cm is 3.4 cm because the (.4) or 4/10 added to 3 is 3.4. 4/10 OS the same as 0.4 because the first place immediately after the decimal is the "tenths" place and 4 of these (four of these) is 0.4, and 0.4 + or added to 3 is 3.4.

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13y ago

What else can I help you with?