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The rope of 1.2 meters in the first volume of the third grade math problem was cut three times, and the average length was how many decimeters.
① 1㎡ decimeter = 12 decimeter.

Cut the rope three times and it will be divided into four sections.

② 120 ÷ 4 = 3 (decimeter).

A: On average, each class lasts for 3 minutes.

definition

Addition: the operation of combining two numbers into one number.

Subtraction: when two addends and one of them are known, the operation of finding the other addend.

Multiplication: the operation of finding the product of two numbers.

Division: the operation of finding another factor by knowing the product of two factors and one of them.

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