“亿以内数的读法和写法”是“万以内数的读法和写法”的延伸。教学中，要以旧引新，促进知识的迁移。一、以旧引新，建立数位顺序表在算盘上拨珠数数。１０个一是十……１０个一百是一千。继续拨珠，满十进一，一千一千地数，１０个一千是一万；１０个一万是十万；１０个十万 The “Reading and Writing Method of Hundreds of Hundreds of Hundreds” is an extension of the “Method of Reading and Writing Within Hundreds of Hundreds.” In teaching, we should introduce the old to promote the transfer of knowledge. First, the old introduction of new, the establishment of a numerical order table count beads on the abacus. Ten one is ten ... ten hundred is a thousand. Continue to dial the beads, full of ten into one, one thousand one thousand one hundred thousand, ten one thousand is ten thousand; ten ten thousand is ten thousand; ten hundred thousand