The reciprocal of 52 is 25 ()

The reciprocal of 52 is 25 ()

Wrong, his reciprocal is 1 / 52, 52 is equivalent to 52 / 1, because 52 divided by 1 is not equal to 52. It is equivalent to the reciprocal of 3 / 4 is 4 / 3

Because a * b = 1, a and B are reciprocal
(2) One quarter of eight tons is one ton
(3) Divide the 3-meter-long line into 4 parts, each of which is three-quarters of the total length
(4) If a is seven times of B, B is one seventh of A
(5) One sixth of the price increase is to treat the price increase as a unit

Yes
yes
wrong
yes
wrong

If a is less than B and less than 1, the reciprocal of a is greater than the reciprocal of B

Wrong
A ＜ 0, and 0 ＜ B ＜ 1, meet the known conditions, but at this time, the reciprocal of a is negative, and the reciprocal of B is an integer, that is, the reciprocal of a is less than the reciprocal of B

76 * 39-66 * 39 = simple algorithm

76*39-66*39
A (B-C) = AB AC
=39*（76-66）
=39*10
=390

Simple operation of 34 + 34 × 75 + 76 × 66

34+34*75+76*66
=76*34+76*66
=76*(34+66)
=76+100
=7600

A simple algorithm of 16 * 35 + 28 * 70 + 35 * 28

16*35+28*70+35*28
=35*（16+56+28）
=35*（72+28）
=35*100
=3500
Extracting common factors

A simple algorithm of multiplying 1.01 by 16.5

The solution is 1.01 × 16.5
=（1+0.01）×16.5
=16.5+0.165
=16.665.

The simple algorithm is + 1 / 4 + 1 / 16

If: 1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 + 1 / 32, if: 1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 + 1 / 34 = 1-1 / 2 + 1 / 2-1 / 4 + 1 / 4-1 / 8 + 1 / 8-1 / 16 + 1 / 34 = 1 -- 1 / 16 + 1 / 34 = 15 / 16 + 1 / 34 = 263 / 272, if: 1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 + 1 / 32 = 1-1 / 2 + 1 / 2-1 / 4 + 1 / 4-1 / 8 + 1 / 8 -

A simple algorithm of 72 × 125

72×125
=9×8×125
=9×1000
=9000

Simple algorithm of 72 / 125
Just debit card

72/125=72*0.008=0.576