1 km =1000m

1 m = 10 decimeter

1 decimeter = 10/0cm

1 m = 100 cm

1? Cm = 10/0mm

Weight unit conversion:

1 ton = 1000 kg

1 kg =1000g

1 kg = 1 kg

Currency unit conversion:

Rmb unit conversion: 1 yuan = 10 angle 1 angle = 10 minute 1 yuan = 100 minute?

Time unit conversion: 1 century = 100 1 year =65438+ February.

1 day =24 hours

1 =60 points

1 min =60 seconds

1 =3600 seconds

Speed × time = distance

Distance/speed = time

Distance/time = speed

Unit price × quantity = total price

Total price/unit price = quantity

Total price ÷ quantity = unit price

Work efficiency × working hours = total workload.

Total amount of work ÷ work efficiency = working hours

Total workload ÷ working time = working efficiency

Appendix+Appendix = Sum

And then what? An addend? = Another addend?

Negative-negative = difference

Negative difference = negative

Difference+negative = negative

Factor × factor = product

Product ÷ One factor = another factor

Dividend = quotient

Dividend = divisor

Quotient × Divider = Divider

1. Perimeter: The sum of all side lengths surrounding a closed figure is called perimeter.

2.？ Square circumference: side length+side length+side length+side length = circumference? Or? Side length × 4 = perimeter

3.？ Characteristics of a square: four sides are equal and four right angles.

4.？ Rectangular circumference: length+length+width+width = circumference or? (length+width) × 2 = circumference

5.？ The characteristics of a rectangle: the opposite sides are parallel and equal to four right angles.

6.？ The characteristics of parallelogram are: the opposite sides are parallel and equal, easy to deform, without right angles and diagonal lines are equal.