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27.(332+68)+73.(332+68)=27.400+73.400=400.(27+73)=40000
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Bài làm
1)43.37+93.43+57.61+69.57
= 43.(37+93) + 57.(61+69)
= 43.130 + 57.130
= 130.( 43+57 )
= 130.100
= 13000
2)27.332+68.27+73.332+68.73
= 27.(332+68) + 73.(332+68 )
= ( 332 + 68 ) . ( 27 + 73 )
= 400 . 100
= 40000
3)67.99
= 6633
4)998.34
= 33932
5)2.31.12+4.6.42+8.27.3
= 744 + 1008 + 648
= 2400
6)36.28+36.82+64.69+64.41
= 36.( 18 + 82 ) + 64.( 69 + 41 )
= 36 . 100 + 64 . 110
= 3600 + 7040
= 10640
# Học tốt #
1) \(43.37+93.43+57.61+69.57\)
\(=\left(43.37+93.43\right)+\left(57.61+69.57\right)\)
\(=43\left(37+93\right)+57\left(61+69\right)\)
\(=43.130+57.130\)
\(=130\left(43+57\right)\)
\(=130.100\)
\(=13000\)
2) \(27.332+68.27+73.332+68.73\)
\(=\left(27.332+73.332\right)+\left(68.27+68.73\right)\)
\(=332\left(27+73\right)+68\left(27+73\right)\)
\(=332.100+68.100\)
\(=100\left(332+68\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 67 . 101 = 6767
b) 67 . 99 = 67 . (100 - 1) = 6700 - 67 = 6633
c) 64 . 44 + 36 . 44 = 44 . (64 + 36) = 44 . 100 = 4400
d) 45 . 22 + 55 . 23 = 45 . 22 + 55 . 22 + 55 = 22 . (45 + 55) + 55 = 22 . 100 + 55 =2255
đ) 48(73 + 127) + (73 + 127) 152 = 48 . 200 + 152 . 200 = 200 = (48 + 152) . 200 = 200 . 200 = 40000
e) 27 . 332 + 68 . 27 + 73 . 322 + 68 . 73
= 27 . 332 + 73 . 332 + 68 . 27 + 68 . 73
= 332 . (27 + 73) + 68 . (27 + 73)
= 332 . 100 + 68 . 100
= (332 + 68) . 100
= 400 . 100
= 40000
![](https://rs.olm.vn/images/avt/0.png?1311)
a )
17 . 4 = 17 . ( 2 . 2 ) = ( 17 . 2 ) . 2 = 34 . 2 = 68
25 . 28 = 25 . ( 4 . 7 ) = ( 25 . 4) . 7 = 100 . 7 = 700
b )
13 .12 = 13 . ( 10 + 2 ) = 13 . 10 + 13 . 2 = 130 + 26 = 156
53 .11 = 53 . ( 10 + 1 ) = 53 . 10 + 53 . 1 = 530 + 53 = 583
39 .101 = 39 . ( 100 + 1 ) = 39 . 100 + 39 . 1 = 3900 + 39 = 3939
27.232 + 68.27 + 73.332 + 68.73
= 237.564
tk nhé
viet ro ra