Giải thích các bước giải:
`a)`
`10 3/5 -5 1/2`
`=10+3/5 -5 -1/2`
`=(10-5)+(3/5-1/2)`
`=5+(6/10-5/10)`
`=5+1/10`
`=50/10+1/10`
`=51/10`
`b)`
`-7 2/3+3 4/7`
`=-23/3+25/7`
`=-161/21+75/21`
`=-86/21`
`c)`
`11 1/4-(2 5/7+5 1/4)`
`=11+1/4-(2+5/7+5+1/4)`
`=11+1/4-2-5/7-5-1/4`
`=(11-2-5)+(1/4-5/7-1/4)`
`=4-5/7`
`=28/7-5/7`
`=23/7`
`d)`
`4,35+8 5/7+3,15+1 2/7`
`=(4,35+3,15+8+1)+(5/7+2/7)`
`=16,5+7/7`
`=16,5+1`
`=17,5`