How to calculate 5 out of 18 × 4 out of 1 × 10 out of 9? Please go to school immediately. There are also 1 out of 4 + 2 out of 9 sum × 36 There is also a 7 / 11 × 8 / 3 × 9 / 4 It should be simple

How to calculate 5 out of 18 × 4 out of 1 × 10 out of 9? Please go to school immediately. There are also 1 out of 4 + 2 out of 9 sum × 36 There is also a 7 / 11 × 8 / 3 × 9 / 4 It should be simple

5 out of 18 × 1 out of 4 × 9 out of 10
=5 out of 18 × 9 out of 10 × 1 out of 4
=1 / 4 × 1 / 4
=1 / 16
Sum of 1 / 4 + 2 / 9 × 36
=1/4×36+2/9×36
=9+8
=17
7 of 11 × 8 of 3 × 9 of 4
=7 / 11 × 1 / 6
=7 out of 66

(- 81) △ 2 and 1 / 4 × 4 / 9 △ (- 15)

1 and 1 / 15

How to calculate √ (81 / 4 + 9 / 4) + √ (1 / 4 + 9 / 4) = 2 √ 10
Be more detailed

a2+b2=（a+b）2-2ab
therefore
a+b=√（a2+b2+2ab）
√（81/4+9/4)=a
√（1/4+9/4)=b
Bring in
√（81/4+9/4)+√（1/4+9/4)
=√（（81/4+9/4)+（1/4+9/4)+2（81/4+9/4)（1/4+9/4))
=
2√10

How to calculate (1 81) △ 2 and 1 / 4-4 / 9 ^ (1 16),