Answer:
3.9 × 5.3 = 20.67
Explanation:
given data
digit 1 = 3.9
digit 2 = 5.3
to find out
multiplying 3.9 * 5.3
solution
we know that 3.9 round about = 4
and 5.3 round about = 5
so 5 × 4 will be = 20
but here when we remove decimal
simple multiply it as
[tex]\frac{39}{10}[/tex] × [tex]\frac{53}{10}[/tex]
here 39 × 53 = 2067
and 10 × 10 = 100
so now we get
[tex]\frac{39}{10}[/tex] × [tex]\frac{53}{10}[/tex] = [tex]\frac{2067}{100}[/tex]
put here again decimal point
3.9 × 5.3 = 20.67
