“在三算结合”实验教学中,乘法口诀采用的是“大九九”,大九九反映被乘数和乘数意义明确。例如:四二08表明四个2是8,四是相同加数,2是相同加数的个数…… 大九九的读法不读位值,乘用丢十补“0”法。例如:三二得6,读作三二零六,八三24,,读作八三二四…… “In the three count combination” experiment teaching, multiplication formula used is “big nine nine”, big nine nine reflect the multiplicand multiplier is clear. For example: four two 08 shows that four 2 is 8, four are the same addend, 2 is the same number of addends ... ... ninety-nine read do not read bit value, multiply lost ten fill “0” method. For example: thirty-two was 6, read three two hundred and sixty-eight, eight three 24, read eight three two four four ......