12,6:4x23:56=
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11133-34-4x23=11133-34-92=11133-(34+92)
=11133-126=11007
\(12,6\times1,4-12,6\times1,3\)
\(\Rightarrow12,6\times\left(1,4-1,3\right)\)
\(\Rightarrow12,6\times0,1\)
\(\Rightarrow1,26\)
1,26
0,205
0,126
0,4715
0,0126
0,5035
ai tk cho mk thì mk tk lại cho
12.6*0.1=1.26
2.05*0.1=0.205
12.6*0.01=0.126
47.15*0.01=0.4715
12.6*0.001=0.0126
506.5*0.001=0.5065
\(\left(126,74\times126,72+18,63:0,9\right)\times\left(126-12,6:0,125-12,6\times2\right)\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-\left(12,6:0,125+12,6\times2\right)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-\left(12,6\times8+12,6\times2\right)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left\{126-\left[12,6\times\left(8+2\right)\right]\right\}\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-(12,6\times10)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left(126-126\right)\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times0\)
\(=0\)
(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
=1,29375
Đúng thì xin 1 k