GMAT数学讲义.ppt

有关数学的运算 Add,plus Subtract Difference Multiply, times Product divide 有关数学的运算 Add,plus Subtract Difference Multiply,times Product divide ?加?减?差?乘?积?除有关数学的运算 Divisible Divided evenly Divident Divisor Quotient Remainder 有关数学的运算 Divisible Divided evenly Divident Divisor Quotient Remainder ?可被整除的?被整除?被除数,红利?因子,除数?商?余数? Which of the following could be the remainder when four consecutive positive integers are each divided by 3? ? A. 1,2,3,1 ? B. 1,2,3,4 ? C. 0,1,2,3 ? D. 0,1,2,0 ? E. 0,2,3,0 Power Radical sign,root sign factorial ?乘方?方根?阶乘 N!=1 *2*3* ....(N-2) * (N-1) *N 且规定 0!=1 例如 8!=1 *2*3*4*5*6*7*8 Power Radical sign,root sign factorial ?1、根号 8除以 2倍根号 2 ? If United States imports increased 20 percent and export decreased 10 percent during a certain year,the ratio of imports to exports at the end of the year was how many times the ratio at the beginning of the year? ? A. 12/11 B. 4/3 ? D. 3/2 有关数学的运算 Round off Round to 熟悉: sqrt(2)= sqrt(3)= sqrt(5)=