Gong Li

Yin gong

Zhanggong

Akamiya

Muramiya

Divide the masses

Qian Li

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Mish

Mi rice noodle

writing brush

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Meter kmhmdammdmcmmm1km =1000 m (1m = 0.001km).

1 m = 100 cm (1 cm =0.0 1 m)

1cm =10mm (1mm = 0.1cm) weight unit: < top> weight metric tons.

Weigh one kilogram, two cents, one gram, one millimeter and ten cents.

Silk tqmagkghgdggdgcgmg 1 metric ton = 1000 kg (1 kg =0.00 1 metric ton)

1kg =1000g (1g = 0.001kg) area unit: < top> area square kilometer square kilometer square kilometer square kilometer square kilometer square kilometer square inch square centimeter hectare square kilometer Aha M2DM2C21square kilometer =

1m2 =100 *100cm2 volume:

Shaogong

Cuo Qian Sheng Bai Sheng Shi Sheng Li Fen

Shenghao

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(c) The volume is cubic meters and cubic inches.

square

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Minute 1 Gong Bing = 1 000L (1L =0.00 1 Gong Bing).

1L = 10 male (1 male = 0. 1L)

1 l = 1 000g (1g =0.00 1 l)

1 m3 =100 *100 *100 cubic centimeter formula set: [relationship of speed, time and distance] [sum and difference problem] [three laws of multiplication] [area of regular polygon] [circumference and area of circle] [sum and average] < inverse formula set > rate× time = distance

Distance/time = speed

Distance ÷ rate = time sum difference problem: (sum+difference) ÷ 2 = large number.

(sum and difference) ÷ 2 = three laws of fractional multiplication: the law of exchange: two or more numbers are multiplied, A× B = B× A, and their positions are interchanged, and the result is unchanged.

Distribution law: change a number into more than two numbers, for example, ~ 29 = 20+9.

Law of Association: Change one number into more than two numbers, such as ~ 3× 5+9× 5 = (3+9 )× 5 =12× 5 = 60 Regular polygon area: square = side length × side length.

Rectangular = length × width

Parallelogram = base × height

Triangle = base × height ÷2

Trapezoid = (upper bottom surface+lower bottom surface) × height ÷2

Diamond = diagonal x diagonal ÷2 Circle perimeter and area: (π≒3. 14) perimeter = diameter × 3. 14.

Circular area = radius × radius × 3. 14 and sum, mean and number: < top > < inverse formula set > mean × quantity = sum.

Sum/number = average

Sum-average = probability of a simple number: probability = number of possible occurrences ÷ total occurrences.

(partial quantity ÷ total quantity)

Number of possible occurrences = total occurrences × probability

Total occurrence times = possible occurrence times ÷ calculation of probability interest: principal × interest rate × number of periods = interest.

Principal = interest/number of periods/interest rate

Interest rate = interest/number of installments/principal.

Number of installments = interest/interest rate/principal