Is (π - 1) x a monomial Such as the title

Is (π - 1) x a monomial Such as the title

It's a monomial
Because π - 1 is a constant, it's a number times x, so it's a monomial

Is one in x a monomial

An algebraic expression consisting of the product of a number and a letter or the product of a letter and a letter is called a monomial (a single number or letter is also a monomial)
So 1 / X is not a monomial

Is 2 / (x-1) a monomial?

No, it's a fraction. It's a fraction whose denominator contains letters

Simple calculation of grade one in junior high school-16 × (- 7.9/2) - (- 4.7/3) × (- 7.9/2) - 2.7/4 × 7.9/2

-16 × (- 7 2 / 9) - (- 4 3 / 7) × (- 7 2 / 9) - 2 4 / 7 × 7 2 / 9 = 16 × (7 2 / 9) - (4 3 / 7) × (7 2 / 9) - 2 4 / 7 × 7 2 / 9 = [16 - (4 3 / 7) - 2 4 / 7] × 7 2 / 9 = [16-4-3 / 7-2-4 / 7] × 7 2 / 9 = [10-3 / 7-4 / 7] × 7 2 / 9 = (10-1) × 7 2 / 9 = 9 × 65 / 9 = 65

1、 4 / 5 × 1 / 2 = 2 / 3 △ 1 / 9 = 11 / 16 △ 11 / 16=

4/5×1/2 =2/5
2/3÷1/9 =6
11/16÷11/16 =1

（1）0.4-(-4/1）+6/1（2）3/1-（-6/5）+3/2（3）3/1+（-5/1）+1+3/2（4）27-18+（-7）-32
（5）0.5+（-4/1）-（2.75）+2/1（6）33.1-（-22.9）+（-10.5）（7）（-8）-（-15）+（-9）-（-12）（8）-3/2+（-6/1）-（-4/1）-2/1（9）5/3-2/3+（-4/11）+4/13

(1) 4 - (- 4 / 1) + 6 / 1 = 0.4 + 1 / 4 + 1 / 6 = 24 / 60 + 15 / 60 + 10 / 60 = 49 / 60 (49 / 60) (2) 3 / 1 - (- 6 / 5) + 3 / 2 = 1 / 3 + 5 / 6 + 2 / 3 = 2 / 6 + 5 / 6 + 4 / 6 = 11 / 6 (11 / 6) (3) 3 / 1 + (- 5 / 1) + 1 + 3 / 2 = 1 / 3-1 / 5 + 1 + 2 / 3 = 5 / 15-3 / 15 + 10 / 15 = 2

27-18+（-7）-32．

The original formula = 27-18-7-32 = 27-47 = - 20

-2.5+(-1/5) 0.4-(-1/4)+1/6 1/3-(-5/6)+2/3 1/3+(-1/5)+1+2/3 27-18+(-7)-32 0.5+(-1/4)-(2.75)+1/2

-2.5+(-1/5) =-2.5-0.2=-2.70.4-(-1/4)+1/6 =2/5+1/4+1/6=24/60+15/60+10/60=49/601/3-(-5/6)+2/3 =(1/3+2/3)-(-5/6)=1+5/6=11/61/3+(-1/5)+1+2/3 =(1/3+2/3)+(1-1/5)=1+4/5=9/527-18+(-7)-32 =27-(18+7+32)=27-47=-...

27-18 + (- 7) - 32 1 / 3 + (- 1 / 5) - 1 + 1 / 3 10.5 + (- 1 / 4) - (2.75) + 1 / 2
(- 2 / 3) + (- 1 / 6) - (- 1 / 4) - 1 / 2

27-18 + (- 7) - 32 = 9-7-39 = - 1 of 303 + (- 1 of 5) - 1 + 1 of 3 = 1 / 3 + 1 / 3-1 / 5-1 = 2 / 3-1 / 5-1 = 7 / 15-1 = - 8 / 15 (- 8 of 15) 0.5 + (- 1 of 4) - (2.75) + 1 of 2 = 0.5 + 0.5 - (0.25 + 2.75) = 1-3 = - 2 (- 2 of 3) + - 1 of 6 - (- 1 of 4) - 2

(1 / 2-3 + 5 / 6-7 / 12) × (- 36) fast

（1/2—3+5/6—7/12）×（—36）
=（6/12—3+10/12—7/12）×（—36）
=(9/12-3)x(-36)
=(-27)+108
=81