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Activities 5


5.1)

Compute and simplify the expressions below as much as possible.

a)
3 × 4 6
b)
5 × 3 5
c)
6 × 4 12
d)
2 × 9 3
e)
8 4 × 5
f)
4 3 × 12
g)
4 6 × 9
h)
14 8 × 4

a)
3 × 4 6
b)
5 × 3 5
c)
6 × 4 12
d)
2 × 9 3
e)
8 4 × 5
f)
4 3 × 12
g)
4 6 × 9
h)
14 8 × 4

5.2)

Compute and simplify these expressions as much as possible.

a)
3 5 × 2 3
b)
2 7 × 1 2
c)
1 2 × 1 3
d)
5 2 × 2 5
e)
6 11 × 2 3
f)
5 8 × 9 2
g)
6 4 × 2 4
h)
10 13 × 1 4
i)
4 9 × 6 8
j)
20 25 × 5 2

a)
3 5 × 2 3
b)
2 7 × 1 2
c)
1 2 × 1 3
d)
5 2 × 2 5
e)
6 11 × 2 3
f)
5 8 × 9 2
g)
6 4 × 2 4
h)
10 13 × 1 4
i)
4 9 × 6 8
j)
20 25 × 5 2

5.3)

Compute and simplify these expressions as much as possible. (Hint: Use prime factorization.)

a)
16 7 × 21 256
b)
15 9 × 27 40
c)
13 18 × 36 26
d)
24 85 × 51 42
e)
56 57 × 38 24
f)
24 1440 × 360 3 × 336 360
g)
2 5 × 5 3 × 3 7 × 7 2
h)
11 12 × 3 7 × 7 11 × 12 3
i)
6 8 × 9 10 × 10 12 × 16 20
j)
22 5 × 1 7 × 1 11 × 1 3
k)
2 7 × 3 8 × 3 10 × 4 6
l)
4 3 × 2 6 × 10 3 × 11 9

a)
16 7 × 21 256
b)
15 9 × 27 40
c)
13 18 × 36 26
d)
24 85 × 51 42
e)
56 57 × 38 24
f)
24 1440 × 360 3 × 336 360
g)
2 5 × 5 3 × 3 7 × 7 2
h)
11 12 × 3 7 × 7 11 × 12 3
i)
6 8 × 9 10 × 10 12 × 16 20
j)
22 5 × 1 7 × 1 11 × 1 3
k)
2 7 × 3 8 × 3 10 × 4 6
l)
4 3 × 2 6 × 10 3 × 11 9

You can find the solutions here.

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Multiplication of Fractions and Integers
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