Unit 5 Maths Problems 课件

课件18张PPT。Unit 5
Maths problemsten 十
twenty 二十
thirty 三十
forty 四十
fifty 五十
sixty 六十
seventy 七十
eighty 八十
ninety 九十
one hundred 一百One
Two
Three
Four
Five
Six
Seven
Eight
Nine
Ten一千？one thousandTwo add two is four
Ten add twenty is thirty
Thirty eight add twenty three
is sixty one add 35 is ?
28 add 58 is ?
39 add 45 is ?Eight minus two is six
twenty minus ten is ten
Fifty eight minus twenty three
is thirty five minus 15 is ?
99 minus 54 is ?
77 minus 45 is ?New wordsfood 食物New wordsradio
录音机New wordsoxygen 氧气New wordsspace suits
太空服Ask the following questions:If there were no horses, pigs and goats, how many animals would there be on the farm？What did Bob do last week and how much time did he spend on each time?How many hours are there in one week?
Which activity takes up most of time?Look think and colour.Sarah’s bedroom floor is covered in triangles. Use colors to make a pattern on her floor.William’s bedroom floor is covered in squares. Use colors to make a pattern on his floor.A quick way to do maths1) Large number go firstPut the large number first and
count on the small one.e.g to work out 7+496 quickly,
we should change 7+496 to 497+7Try the following numbers quickly:
6+191 2+783 6+894 5+977A quick way to do maths2) Easy addingTo add 9, add 10, then jump back 1
To add 11, add 10, then jump on 1 more
To add 19, add 20, then jump back 1Try the followings :
42+9 68+9 84+11 67+19 A quick way to do maths3) Make it easyTo add 24+7+3+6, look for easy pairse.g to work out 24+7+3+6 quickly,
we should change 24+7+3+6 to 24+6+3+7Try the following numbers quickly:
77+5+15+3 38+5+2+25
48+4+2+6 87+9+3+1Work the answers out in pairsWhat must be added to 391 to make 400?
What is the difference between 501 and 489?Can you speak these in English:368 plus 200 315 minus 100
140 take away 50 add 278 and 8
1200 minus 600 826 minus 710Work the answers out in pairsCan you spot the pattern
of the followings?New words and phrasesthink up 想出bring sth with sb 某人随身携带。。。be ready to do sth 准备做某事at any time 在任何时候be good at 擅长。。。work out 算出straight away 立刻，马上easy-going 外向的understand 理解New words and phrasesWhen it comes to… 当轮到。。。的时候win 赢winner 胜利者ping-pong match 乒乓球赛important 重要的receive 得到light 灯go out 熄灭go on with 继续 = continue