牛津小学英语三年级下UNIT5

[00:05.88]A  Learn to say
[00:13.14]What's ten plus¹ five?  It's fifteen.
[00:20.11]That's right.What's seven plus thirteen?
[00:26.46]It's nineteen.Sorry.You're wrong. It's twenty.
[00:33.62]What's twenty minus² twelve?
[00:38.79]It's eight. That's right.
[00:43.55]What's eighteen minus four?
[00:48.59]I't s sixteen. Oh,no.It's fourteen.
[01:03.14]B  Look and learn
[01:10.01]thirteen  fourteen  fifteen  sixteen
[01:22.44]seventeen  eighteen  nineteen  twenty
[01:42.50]D Look,read and write
[01:50.05]Ii   Jj   Kk
[02:05.91]E  Fun house
[02:10.17]1.Listen and say
[02:16.93]a.Listen and say the next number.
[02:42.01]b.Listen and say the number before.
[03:16.57]3.Sing a song
[03:22.81]Twenty green bottles

1 plus   

n.加号，正号；adj.超过的，正的；prep.加上

参考例句：

• Four plus five is nine.四加五等于九。
• All the children here are 12 plus.这里所有的孩子都大于十二岁。

2 minus   

n.负号；adj.减的，负的，阴性的；prep.减，缺

参考例句：

• The temperature was minus 30 degrees.气温为零下30度。
• He seems to have mistaken a minus for a plus.他似乎把负号误作正号了。