Simple math operation in grade six 100 answer.

Simple calculation of 99× 13+ 13

=( 100- 1)x 13+ 13？

= 100 x 13- 13+ 13？

= 1300 + ( 13 - 13)?

= 1300

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1, extracting common factor: This method actually uses multiplication and division to extract the same factor, and the remaining items in the exam are often added and subtracted, and an integer will appear.

2. Split method: Split method is to split a number into several numbers for the convenience of calculation.

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