Maths PPT课件.ppt

plus minus times divide
Make dialogues add
subtraபைடு நூலகம்t multiply
sum equal
Answer the following questions in complete sentences according to the text.
1.How far can Student A skateboard in half an hour? Student A can skateboard ___1_0__kilometres in half an hour. 2.How far can Student B skateboard in half an hour?. Student B can skateboard ___5___kilometres
+ - ×÷
plus minus times divide
=
equal
18+15=33
Eighteen plus fifteen equals thirty-three.
18-15=3
Eighteen minus fifteen equals three. 6×5=30 Six times five equals thirty.
40÷4=10 Forty devided by four equals ten.
The students are
having an English
lesson now.
→
Let’s begin our
maths contest
in English now.
Is every group
Ready?
subtract vt. ＆ vi.常于from连用 减去；扣除；做减法 1）If you subtract 3 from 5,you get 2. 5减去3得2。 2）When did you learn to subtract?你何时学会做减法？
multiply vt. ＆vi.(常于by连用）乘，使相乘；做乘法
1,What will you get if you add up all the numbers from 1 to 100? 2.Yes,Sir. I’ve got the answer. 3.Yes, Carl? Can you do it? 4.Listen,class. Be quiet, please. I’d like you to work out a sum. 5.what a clever boy you are! 6.It’s 5050.
If you multiply3 by 5, you will get 15. 9 multiply by 9 is 81.
Divide vt.＆vi. 除，（被）除尽 If you divide 8 by 2, you get 4. 以2除8得4。 20 divided by 5 is 4. 20 除5 等于4。
in half an hour. 3.How many kilometres faster can Student A Skateboard than Student B in half an hour. Student A can skateboard ___5___ kilometres faster than Student B in half an hour.
4,1,3,2,6,5
Contest: 24 points
++ - =
omework
Oral work: Listen and read the new words Prepare the text
Written work: Write 10 words sentences about sums
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Notes to the new words
Add (up) vt. ＆ vi. (常与to连用） 21.)）.IfAydoduuapddth4esteo n3u,ymoubegrest,p7l.ea4se加.请3加得起7这。些数字。 3.)When did you listen to add?你和时学会做加法？