Bài 2 :
a) `60 - 26 ,75 - 13,25`
`= 60 - 13,5`
`= 46,5`
b) `38,25 - 18,25 + 21,64 - 11,64 + 9,93`
`= 20 + 10 + 9,93`
`= 30 + 9,93`
`= 39,93`
c) `45,28 + 52,17 - 15,28 - 12,17`
`= ( 45,28 - 15,28 ) + ( 52,17 - 12,17 )`
`= 30 + 40`
`= 70`
d) `( 72,69 + 18,47 ) - ( 8,47 + 22,69 )`
`= 72,69 + 18,47 - 8,47 - 22,69`
`= ( 72,69 - 22,69 ) + ( 18,47 - 8,47 )`
`= 50 + 10`
`= 60`
e) `64` x `23 + 37` x `23 - 23`
`=` `( 64 + 37 - 1 )` x `23`
`= 100` x `23`
`= 2300`
f) `4,86` x `0,25` x `40`
`= 4,86` x `10`
`= 48,6`
g) ( Chụp thiếu đề )
h) `0,8` x `96 + 1,6` x `2`
`= 76,8 + 3,2`
`= 80`
i) `96,28` x `3,527 + 3,527` x `3,72`
`= ( 96,28 + 3,72 )` x `3,527`
`= 100` x `3,527`
`= 352,7`
f)` 8` x `4` x `125` x `25`
`=` `( 25` x `4 )` x `( 125` x `8 )`
`= 100` x `1000`
`= 100000`
