Calculation method of 204-198 + 192-186. + 24-18 + 12-6 arithmetic sequence

Calculation method of 204-198 + 192-186. + 24-18 + 12-6 arithmetic sequence

204-198+192-186.+24-18+12-6
=（204-198）+（192-186）.+（24-18）+（12-6）
=6+6+…… +6+6
=6×17
=102

204-198 + 192-186 ····· + 24-18 + 12-6] use a simple method to calculate

All numbers differ by 6, so there are (204-6) / 6 + 1 = 34 numbers from 204 to 6
The above number can be written as a group of two, namely (204-198) + (192-186) + (12-6)
The number of each group was 6, and there were 34 / 2 = 17 groups
So the number is: 17 * 6 = 102

How to calculate 204-198 +. + 12-6?

204-196=6
12-6=6
Never die old
Let's see how many sixes there are
Just multiply

Calculation: 18 ° 15 ′ 36 ″=______ °；118°18′-66°23′=______ ．

18 ° 15 ′ 36 ″ = 18.26 °, 118 ° 18 ′ - 66 ° 23 ′ = 51 ° 55 ′

The factorization formula is 2042 + 204 × 192 + 962

2042+204×192+962=（204+96）2=90000．

Simple calculation 12 * 80 + 12 * 20

Extracting common factors
12*(80+20)=12*100=1200

How to calculate 125 * 12 * 80 simply

=125*12*8*10
=(125*8)*(12*10)=1000*120=120000

How to calculate 720 × 12 △ 80 simply
Comprehensive formula!

720×12÷80
＝720÷80×12
＝9×12
＝108

80 / 12 simple operation
(52+28)*(72/6)=80/12=

80/12=20×4÷3×4=20/3；
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Simple calculation of 10000 / (80 / 24 / 12)

10000÷ （80÷ 24÷ 12）
=10000X24X12÷ （8X10）
=1000X24X12÷ 8
=1000X12X（24÷ 8）
=1000X12X3
=36000