Unit 5 Maths problems

OneTwo Three Four Five Six Seven Eight Nine Ten

ten twenty thirty

十 二十 三十 四十

一千？fiftysixty eighty

forty

五十六十

seventy 七十 one thousand八十

ninety

九十

one hundred 一百

Two add two is fourTen add twenty is thirty

Thirty eight add twenty threeis sixty one35 add 35 is ?

28 add 58 is ?39 add 45 is ?

Eight minus two is sixtwenty minus ten is ten

Fifty eight minus twenty threeis thirty five35 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:

如果农场里没有猪/马/山 羊/小鸡/鸭子，剩下的有 多少只动物呢？

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.

1) 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+7 Try the following numbers quickly: 6+191 2+783 6+894 5+977

2) 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 1

Try the followings :42+9 68+9 84+11 67+19

3) Make it easyTo add 24+7+3+6, look for easy pairs e.g to work out 24+7+3+6 quickly, we should change 24+7+3+6 to 24+6+3+7 Try the following numbers quickly: 77+5+15+3 38+5+2+25

48+4+2+6

87+9+3+1

What must be added to 391 to make 400?What is the difference between 501 and 489?

Can you speak these in English:368 plus 200 140 take away 50 1200 minus 600 315 minus 100 add 278 and 8 826 minus 710

Can you spot the pattern

of the followings?2 4 6 26 21 16

2

5

890

11

11

34

59 16

100 95