1 km = 1000 m?
1 m = 10 decimeter?
1 decimeter = 10/0cm?
1 m = 100 cm?
1 cm = 10/0mm
(2) Weight unit rate:
1 ton = 1000 kg?
1 kg = 1000 g?
1 kg = 1 kg =2 kg?
500g = 1 kg
(3) Monetary unit rate:
RMB unit conversion:
1 yuan = 10 angle?
1 angle = 10 minute?
1 yuan = 100 integral.
(4) addition and subtraction:
Appendix+Appendix = sum?
Addendum sum = another addend
Minus-Minus = Difference?
Minus-Difference = Minus?
Difference+Minus = Minus
(5) perimeter formula:
Square perimeter: side length+side length+side length = perimeter or side length X 4= = perimeter.
Rectangular circumference: length+length+width+width = circumference or (length+width) X 2= = circumference.