今晚头一次跟二囡讲进位。告诉她21-4是怎么回事。讲解完后问她懂了吗。说懂了。我不信,就问她,那你跟我讲讲35-6是怎么回事。
二囡眨巴着大眼睛开讲:
Since 5 is smaller than 6, they have to go to a math shop get get some stuff. First they need to go to a ten’s shop to get a 10. 10 takes away 6 is 4. Now number 35 only has 2 tens left. That’s twenty. They go to the math shop to get a sticker and put the 5 and 4 together. That will make a 9. Now they get a plus sticker to put 20 and 9 together. After they done their shopping at the math shop, they come out as 29!
嗯,虽然啰嗦,好像通过我二十几分钟的枯燥解释,她也有了自己的意会,抓住了精华。