274 + 99456-198, 12 out of 5 × (5 out of 6 + 3 out of 4) + 1 out of 5?

274 + 99456-198, 12 out of 5 × (5 out of 6 + 3 out of 4) + 1 out of 5?

274+99=274+100-1=374-1=373
456-198=456-(200-2)=456-200+2=256+2=258
12 / 5 × (5 / 6 + 3 / 4) + 1 / 5
=12/5*5/6+12/5*3/4+1/5
=2+9/5+1/5
=2+10/5
=4

1988 × four fifths + four fifths × 13 minus four fifths

1988 × four fifths + four fifths × 13 - four fifths
=1988 × 4 / 5 + 4 / 5 × 13 - 4 / 5 × 1
=(1988 + 13-1) × four fifths
=2000 × 4 / 5
=1600

(- 1 / 2) ^ 13 * 3 ^ 8 * (- 2) ^ 12 * (- 1 / 3) ^ 7 = subtraction

The original formula = (- 1 / 2) ^ 12 * (- 2) ^ 12 * (- 1 / 2) * (- 1 / 3) ^ 7 * 3 ^ 7 * 3 = (- 1 / 2) * (- 2)) ^ 12 * (- 1 / 3) * 3) ^ 7 * (- 1 / 2) * 3 = 1 * (- 1) * (- 3 / 2) = 3 / 2

What does 37 degrees mean

There is no fever. People's body temperature is generally 36 degrees 5-37 degrees 3, which is normal. It is possible that people's body temperature is 37 degrees 5-37 degrees 3 due to the heat at home

3 / 4 × 6 / 5 + 3 / 4 × 6 / 1 can be easily calculated

3 / 4 × 5 / 6 + 3 / 4 × 1 / 6
=3/4*（5/6+1/6）
=3/4*1
=3/4

48 ° 24'36 "is used to express the process

24′=(24/60)°=0.4°
36″=(36/3600)°=0.01°
48°24′36″=48°+0.4°+0.01°=48.41°

Simple calculation method of 23.13 △ 1 / 4 × 4

23.13 ^ (1 / 4 of 23.13 ^) × 4
=23.13÷(23.13×4)×4
=(23.13×4)÷(23.13×4)
=1

Divide 51 into prime factors

51=3*17

Simple calculation: 1 / 13 / 5-2 / 1 * 5 / 3

1:2 / 5:13-1:2 * 3:5
=1 / 2 * 5 / 13-1 / 2 * 5 / 3
=1 / 2 * (13 / 5-3 / 5)
=Two out of two
=1

(1-22 / 1) multiply (1-32 / 1) multiply (1-42 / 1). How to multiply (1-102 / 1)?

There's something wrong with your question. It should be the general formula 1 / N ^ 2. If the above question is correct, I can't do it. If I say the general formula, I can (1-1 / 2 ^ 2) (1-1 / 3 ^ 2). (1-1 / 10 ^ 2)
=(1+1/2)(1-1/2)(1+1/3)(1-1/3)(1+1/4)(1-1/4)...(1+1/10)(1-1/10)
=1/2*3/2*2/3*4/3*...*9/10*11/10
=1/2*11/10
=11/20
The ingenious calculation of fractions is nothing more than one plus one minus (the same number) offsetting each other, or the numerator and denominator of adjacent fractions approximately offsetting each other. I haven't seen other types of questions