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Multiply a number by a multiplier and then multiply it by another number.

differentiate

1, when the multiplicand is multiplied by one digit of the multiplier, the column vertical method has been carried out. However, when the multiplicand is multiplied by one digit of the multiplier, the lattice multiplication does not carry forward.

2. Vertical calculation refers to a vertical calculation in the calculation process, which makes the calculation simple. In addition calculation, the same numbers are aligned. If the sum exceeds 10, it will move forward to 1. When subtracting, the same numbers are aligned. If it is not enough, borrow 1 from the last digit as 10.

"Lattice multiplication" is a calculation method of multiplying two numbers introduced by Italian mathematician pacioli in his book "An Overview of Arithmetic, Geometry and Proportional Properties" in the middle of15th century. Lattice algorithm is between drawing lines and calculating formulas.

3. When calculating the division vertically, the division should start from the most significant bit. Lattice multiplication writes the factors on the top and right respectively, and then calculates (example: 6×7=42, written on the grid in the upper right corner, 4 on the left, 2 on the right, and so on, and fills in the grid; Finally, add up the numbers on the same diagonal. )

Example:

1 1 × 12 = 132