Calculation: 3.68 × 15.7-31.4 + 15.7 × 0.32=______ ．

Calculation: 3.68 × 15.7-31.4 + 15.7 × 0.32=______ ．

3.68 × 15.7-31.4 + 15.7 × 0.32 = 15.7 × (3.68 + 0.32) - 31.4 = 15.7 × 4-31.4 = 31.4 × 2-31.4 = 31.4, so the answer is 31.4

Simple calculation by factorization
1.22^2*9-1.33^2*4

22^2*9-1.33^2*4
=(1.22*3)^2-(1.33*2)^2
=3.66^2-2.66^2
=(3.66+2.66)*(3.66-2.66)
=6.32*1
=6.32

Simple calculation of factorization
1.25X101^2-99^2X25
2.2010+2010^2-2011^2

1、
=25[(100+1)^2-(100-1)^2]
=25*400=10000
2、
2010+2010^2-(2010+1)^2
=2010-2*2010-1
=-2011
perhaps
=-1-2011+1+2020*2+2010^2-2011^2
=-2011

Simple operation by factorization
The 14th power of 1.10 - the 12th power of 9 * 10
2.75 * 2.6-12 * 3.5

10^14-9*10^12
=10^12(10^2-9)
=91*10^12
75*2.6^2-12*3.5^2
=3*25*2.6^2-3*4*3.5^2
=3*(5*2.6)^2-3*(2*3.5)^2
=3(13^2-7^2)
=3(13+7)(13-7)
=3*20*6
=360