a) \(97\cdot13+130\cdot0,3\)
\(=97\cdot13+13\cdot3\)
\(=13\cdot\left(97+3\right)\)
\(=13\cdot100\)
\(=1300\)
b) \(86\cdot153-530\cdot8,6\)
\(=86\cdot153-53\cdot86\)
\(=86\cdot\left(153-53\right)\)
\(=86\cdot100\)
\(=8600\)
a) \(97.13+130.0,3\)
\(=97.13+13.3\)
\(=13\left(97+3\right)=13.100=1300\)
b) \(86.153-530.8,6\)
\(=86.153-53.86\)
\(=86.\left(153-53\right)=86.100=8600\)
a) 97 x 13 + 130 x 0,3
= 97 x 13 + 13 x 10 x 0,3
= 97 x 13 + 13 x 3
= 13 x ( 97 + 3)
= 13 x 100
= 1300
b) 86 x 153 - 530 x 8,6
= 86 x 153 - 53 x 10 x 8,6
= 86 x 153 - 53 x 86
= 86 x ( 153 - 53 )
= 86 x 100
= 8600
Mình viết "." thay cho nhân, "," cho số thập phân nhé
a) \(97.13+130.0,3=13\left(97+10.\left(0,3\right)\right)=13.100=1300\)
b) \(=86.153-53.10.\left(8,6\right)=86\left(153-53\right)=8600\)