21:(30:10)=
\( 21:(30:10)= \)
\( 15:(2\times5)= \)
\( 70:(14\times5)= \)
\( 10:(10:5)= \)
\( 500:(2000:25)= \)
We will use the formula:
Therefore, we will get:
Let's write the division exercise as a fraction:
Now let's multiply by 10:
We'll reduce the 10 and get:
We will use the formula:
Therefore, we get:
Let's write the exercise as a fraction:
We'll convert it to a multiplication of two fractions:
We multiply numerator by numerator and denominator by denominator, and we get:
1
\( 100-(5+55)= \)
\( 87-(7+0)= \)
\( 2-(1+1)= \)
\( 19-(5+11)= \)
\( 26-(11-2)= \)
40
80
0
3
17
\( 21-(6-13)= \)
\( 18:(6\times3)= \)
\( 300:(5\times6)= \)
\( 66:(360:60)= \)
\( 99:(33:10)= \)
28
1
10
11
30
\( 2-(\frac{1}{1}+\frac{1}{2})= \)
\( 10-(\frac{4}{2}+\frac{3}{2})= \)
\( 100\frac{1}{4}:(\frac{1}{4}\times5)= \)
\( 220:(15\times8)= \)
\( 492:(20\frac{1}{2}\times4)= \)