WORK OUT #1

Mathematics for Children
Mental Computation and Number Sense Exercises
 

Recommended for Age 8-9

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Latihan matematik ini disarankan untuk digunakan oleh murid-murid sekolah rendah berumur 8 hingga 9 tahun. Semua latihan adalah menggunakan ayat bahasa Inggeris. Latihan-latihan matematik ini mengetengahkan konsep mental computation. Laman ini boleh dicetak terus untuk kegunaan guru sebagai salah satu aktiviti dalam kelas.
   
1

For each of these, loop the fact that will help you work out the total. Write the answer.
 
a.
 

80 + 70 = _____
  9 + 6 = 15 11 + 4 = 15
  10 + 5 = 15 8 + 7 = 15
b.
 

110 + 80 = _____
  10 + 9 = 19 11 + 8 = 19
  12 + 7 = 19 13 + 6 = 19
       
c.
 

170 + 60 = _____
  17 + 6 = 23 19 + 4 = 23
  16 + 7 = 23 18 + 5 = 23
d.
 

250 + 60 = _____
  27 + 4 = 31 15 + 16 = 31
  25 + 6 = 31 17 + 14 = 31
2

Complete each of these.
 
a.   7 + 4 = _____ so 70 + 40 = _____
b.   9 + 8 = _____ so 90 + _____ = _____
c.   8 + 5 = _____ so _____ + _____ = _____
d.   _____ + _____ so 130 + 60 = _____
3

Write a fact to help you answer each sentence below. Write the answer.
  a.

_____ + _____ = _____

so

120 + 40 = _____

 b.

_____ + _____ = _____

so

50 + 180 = _____
  c.

_____ + _____ = _____

so

90 + 30 = _____

 d.

_____ + _____ = _____

so

70 + 150 = _____
 
 

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