Formulas that must be memorized in the first volume of mathematics in grade three.

The mathematical formula that must be memorized in the first volume of Grade Three:1cm =1mm;

1 decimeter = 10/0cm;

1km (km) =1000 m;

1 ton = 1000 kg;

The perimeter of the rectangle = (length 1+ width) * 2;

The circumference of a square = side length * 4;

1 =60 seconds;

Weight unit conversion: 1 ton =1000kg; 1kg = 1000g； 1 kg = 1 kg;

The weight of chickens, ducks and geese is grams; The weight of people, dogs, cows and pigs is in kilograms; Elephant sharks weigh several tons;

Currency unit conversion: RMB.

Unit conversion: 1 yuan = 10 angle; 1 angle = 10 point; 1 yuan = 100.

(These are the formulas in the last semester of Grade Three, and a+b=b+a is the algorithm, which I learned in the next semester of Grade Four. )