"Approximate numbers of quotient" PPT courseware of decimal division

"Approximate Numbers of Quotient" Decimal division PPT courseware uses the "rounding" method to find approximate numbers: 43.9095 is reserved for integers ( ) 43.9095 is accurate to tenths ( ) 43.9095 is reserved to two decimal places ( ) 43.9095 is accurate to thousandths ( ) Accurate numbers and approximate numbers: exact numbers: in the numbers encountered in daily life and production, sometimes completely accurate numbers can be obtained, which are precise and error-free. For example, there are 46 students in a certain class, and 46 here is the exact number. Approximate number: In practice, it is often not necessary to describe a quantity with an exact number, or it is impossible to obtain an exact number. For example: China has about 1.3 billion people. 13 here is an approximate number. Significant digits: To which digit is an approximate number accurate, counting from the first non-zero number on the left to this digit, all the digits are called the significant digits of this number. For example: 0.6166≈0.62, there are two valid figures: 6, 2. Further method: Now there are 32 tons of apples, if Dongfeng brand vehicles can only transport 5 tons at a time, how many times will it take to transport 32 tons of apples? When delivering goods, no matter how much goods are left from the last time, they must be delivered. Therefore, in this case, the "further method" needs to be used. It takes 7 cars to go far. Tail removal method: the existing fabric is 60 feet, if you need to make a set of clothes, you need 16 feet of fabric, how many sets of clothes can you make with 60 feet of fabric? Because 0.75 meter cloth cannot be made into a suit of clothes. So you can't use the "rounding" method to approximate 4. Only an approximation of 3 is possible. This courseware gives a comprehensive introduction to the approximation of quotients through small games and exercises, which improves students' interest in learning and helps students better understand and keep in mind the knowledge points of decimal division. It is a good classroom teaching courseware. Keywords: Decimal division courseware, quotient approximation courseware, Xinrenjiao version fifth grade mathematics PPT courseware, fifth grade mathematics slide courseware download, decimal division PPT courseware download, quotient approximate number PPT courseware download, .ppt format more For more about the PPT courseware of "Approximate numbers of decimal division quotients", please click the approximate number ppt label of decimal division ppt quotients. "Approximate Numbers of Quotient" Decimal Division Flash Animation Courseware: "Approximate Numbers of Quotient" Decimal Division Flash Animation Courseware This animation courseware includes review, new lessons, exercises, etc. It helps students understand and apply what they have learned, and fully demonstrates decimals The knowledge points of division "Approximate Numbers of Quotient" are very good teaching aids. ..