Åk 6–9
 
English/Русский
3.8 Exercises – Multiplication and Division

1. Write the following additions as products?

Ex: 2 + 2 + 2 + 2 = 4 · 2
a)
 
b)
 
c)
 
d) 1 + 1 + 1 + 1 + 1
 
e) 9 + 9 + 9 + 9 + 9 + 9 + 9
 
f) 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5
 
g) 12 + 12 + 12 + 12 + 12 + 12
 
 
 

2. Which divisions represent the following subtraction?

Ex: 8 - 2 - 2 - 2 - 2 = 0         
  8 ÷ 2
a) 20 - 5 - 5 - 5 - 5 = 0
 
b)
 
c)
 
d)
 
e)
 
f)
 
g) 44 - 11 - 11 - 11 - 11 = 0
 
 
 

3. Calculate according to the examples below.

Ex: 58 · 7  
  (50 · 7) + (8 · 7) = 350 + 56 = 406
a) 96 ÷ 3
 
b) 27 · 5
 
c) 84 · 6
 
d) 62 ÷ 2
 
e) 936 ÷ 3
 
f) 385 · 9
 
g) 437 · 6
 
 
 

4. Calculate by using approximation.

Ex: 26 · 37 ≈ 30 · 30 = 900
a) 74 · 28 ≈
b) 75 ÷ 9 ≈
c) 39 · 23 ≈
d) 57 ÷ 26 ≈
e) 83 ÷ 41 ≈
f) 87 ÷ 28 ≈
g) 27 · 94 ≈
 
 

5. Calculate by using approximation.

Ex: 110 · 58 ≈ 100 · 60 = 6,000
a) 814 · 69 ≈
b) 565 ÷ 18 ≈
c) 452 · 78 ≈
d) 656 ÷ 67 ≈
e) 18,431 ÷ 358 ≈
f) 87,825 ÷ 289 ≈
g) 591 · 712 ≈