write 378cm to the nearest metre

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To convert from centimeters to meters, divide the value in centimeters by 100.

In this case, to convert 378 cm to meters:
378 cm ÷ 100 = 3.78 m

Now, to round it to the nearest meter:
The tenths digit is 7, which is greater than or equal to 5. In the rounding rule, if the tenths digit is 5 or greater, you round the whole number up.

Therefore, 3.78 m rounded to the nearest meter is 4 meters.

100 cm = 1 meter

378cm / 100 = 3.78 m