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\(12,6\times1,4-12,6\times1,3\)
\(\Rightarrow12,6\times\left(1,4-1,3\right)\)
\(\Rightarrow12,6\times0,1\)
\(\Rightarrow1,26\)
a, 20,22 x 103 - 202,2 x 10 - 20,22 x 3
= 202,2 x 10,3 - 202,2 x 10 - 202,2 x 0,3
= 202,2 x( 10,3 - 10 - 0,3)
= 202,2 x ( 0,3 - 0,3)
= 202,2 x 0
=0
b, 5,8 x 6,3 - 4,9 x 2,6 + 3,7 x 6,3 + 4,9 x 12,6
= ( 5,8 x 6,3 + 3,7 x 6,3) + ( 12,6 x 4,9 - 4,9 x 2,6 )
= 6,3 x ( 5,8 + 3,7) + 4,9 x ( 12,6 - 2,6)
= 6,3 x 9,5 + 4,9 x 10
= 59,85 + 49
= 108,85
\(\left(126,74\times126,72+18,63:0,9\right)\times\left(126-12,6:0,125-12,6\times2\right)\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-\left(12,6:0,125+12,6\times2\right)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-\left(12,6\times8+12,6\times2\right)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left\{126-\left[12,6\times\left(8+2\right)\right]\right\}\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-(12,6\times10)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left(126-126\right)\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times0\)
\(=0\)
(126,74×126,72+18,63:0,9)×(126−12,6:0,125−12,6×2)(126,74×126,72+18,63:0,9)×(126−12,6:0,125−12,6×2)
=(126,74×126,72+18,63:0,9)×[126−(12,6:0,125+12,6×2)]=(126,74×126,72+18,63:0,9)×[126−(12,6:0,125+12,6×2)]
=(126,74×126,72+18,63:0,9)×[126−(12,6×8+12,6×2)]=(126,74×126,72+18,63:0,9)×[126−(12,6×8+12,6×2)]
=(126,74×126,72+18,63:0,9)×{126−[12,6×(8+2)]}=(126,74×126,72+18,63:0,9)×{126−[12,6×(8+2)]}
=(126,74×126,72+18,63:0,9)×[126−(12,6×10)]=(126,74×126,72+18,63:0,9)×[126−(12,6×10)]
=(126,74×126,72+18,63:0,9)×(126−126)=(126,74×126,72+18,63:0,9)×(126−126)
=(126,74×126,72+18,63:0,9)×0=(126,74×126,72+18,63:0,9)×0
=0=0
12,6:0,125+12,6:0,5+12,6x4-12,6:0,25
=12,6x8+12,6x2+12,6x4-12,6x4
=12,6x(8+2)
=12,6x10
=126
12,6 : 0,125 + 12,6 : 0,5 + 12,6 × 4 - 12,6 : 0,25
=12,6 × 8 + 12,6 × 2 + 12,6 × 4 - 12,6 ×4
=12,6 × (8 + 2 + 4 - 4)
=12,6 × 10
=126