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a) 97.13 + 130.0,3
= 97.13 + 13.3
= 13. ( 97 + 3 )
= 13.100
=1300
b) 86.153 - 530.8,6
= 86.153 - 53.86
= 86. ( 153 - 53 )
= 86. 100
= 8600
( Toán lớp 8 đây hả ???)
~HT~
a) \(97\cdot13+130\cdot0,3=97\cdot13+13\cdot10\cdot0,3=13\cdot\left(97+10\cdot0,3\right)=13\cdot100=1300\)
b)\(86\cdot153-530\cdot8,6=8,6\cdot10\cdot153-53\cdot10\cdot8,6=10\cdot8,6\cdot\left(153-53\right)=10\cdot8,6\cdot100=8600\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, \(97.13+130.13\)
\(=13\left(97+130\right)\)
\(=13.227\)
\(=2951\)
b, \(86.153-530.8,6\)
\(=86.153-53.10.8,6\)
\(=86.153-53.86\)
\(=86\left(153-53\right)\)
\(=86.100\)
\(=8600\)
trả lời:
a) 97.13 + 130.13
= 13.( 97 + 130 )
= 13. 227
= 2951
b) 86.153 - 530.8,6
= 86.153 - 53.10.8,6
=86. 153 - 53.86
= 86. ( 153 - 53 )
= 86.100
= 8600
học tốt!
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(97.13+130.0,3\\ =97.13+13.3\\ =13.\left(97+3\right)\\ =13.100=1300\)
b) \(86.153-530.8,6\\ =8,6.1530-530.8,6\\ =8,6.\left(1530-530\right)\\ =8,6.1000\\ =8600\)
![](https://rs.olm.vn/images/avt/0.png?1311)
đây có lẽ là toán lớp 5
a)97*13+130*0,3
=97*13+13*10*0,3
=97*13+13*3
=13*(97+3)
=13*100
=1300
b)86*153-530*8,6
=86*153-53*10*8,6
=86*153-53*86
=86*(153-53)
=86*100
=8600
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(86.153-530.8,6=86.153-53.86=86\left(153-53\right)=86.100=8600\)
![](https://rs.olm.vn/images/avt/0.png?1311)
97.13 + 130.0,3 = 97.13 + 13.10.0,3
= 97.13 + 13.3 = 13.(97 + 3) = 13.100=1300
![](https://rs.olm.vn/images/avt/0.png?1311)
\(199\cdot201=\left(200-1\right)\left(200+1\right)=200^2-1=40000-1=39999\)
86.153 − 530.8,6 = 86.153 – 53.10.8,6
= 86.153 − 53.86 = 86.(153 − 53) = 86.100=8600