1。 Multiply the exchange factor position by 2 again. Product divided by factor.
3。 Product divided by another factor
Question 2: What are the calculation methods of decimal multiplication? According to the meaning of the question, the calculation method of decimal multiplication is the same as that of integer multiplication. The first one: exchange the positions of two factors and recalculate; Second: divide the product by one factor to see if it is equal to another factor.
Question 3: How to calculate decimal multiplication? Remove decimal multiplication, and then point the decimal point of the corresponding number.
Question 4: How to check decimal multiplication There are two ways to check multiplication:
① The multiplication results of recalculation of exchange factor positions should be the same;
② Product divided by one factor = another factor.
For example: 2.5x 1.2=3.
Checking calculation (checking calculation should be vertical): ① 1.2x2.5 = 3.
② 3 ÷ 1.2 = 2.5 or 3 ÷ 2.5 = 1.2
Question 5: How to check decimal multiplication? You can swap these two factors and multiply them.
Question 6: How to calculate decimal multiplication? Ignore the decimal point first and use ordinary multiplication to calculate. Then add up the decimal places of the multiplier, which is the new decimal place.