a,-4/5×7/12+(-4/5)x(-1/6)
b, |-15/2|+3/18-(-5/15)2
c, (2020/4040-1/7)-(-3/21+)-5/12
a,-4/5×7/12+(-4/5)x(-1/6) b, |-15/2|+3/18-(-5/15)2 c, (2020/4040-1/7)-(-3/21+)-5/12
By Parker
By Parker
a,-4/5×7/12+(-4/5)x(-1/6)
b, |-15/2|+3/18-(-5/15)2
c, (2020/4040-1/7)-(-3/21+)-5/12
`a)(-4/5)×7/12+(-4/5)×(-1/6)`
`=(-4/5)×[7/12+(-1/6)]`
`=(-4/5)×[7/12+(-2/12)]`
`=(-4/5)×5/12`
`=-1/3`
`b)|-15/2|+3/18-(-5/15)^2`
`=15/2+3/18-1/9`
`=135/18+3/18-2/18`
`=68/9`
`c)(2020/4040-1/7)-(-3/21)+(-5/12)`
`=(1/2-1/7)+1/7+(-5/12)`
`=1/2-1/7+1/7+(-5/12)`
`=1/2+(-5/12)`
`=6/12+(-5/12)`
`=1/12`
`a) (-4)/5 xx 7/12 + (-4)/5 xx (-1)/6`
` = (-4)/5 xx (7/12 – 1/6)`
` = (-4)/5 xx 5/12`
` = -1/3`
`b) |-15/2| + 3/18 – (-5/15)^2`
` = 15/2 + 3/18 – 1/9`
` =135/18 + 3/18 – 2/18`
` = 68/9`
`c) (2020/4040 – 1/7) – (-3/21) + (-5)/12`
` = 1/2 -1/7 + 1/7 – 5/12`
` = 1/2 – 5/12`
` = 6/12 – 5/12`
` = 1/12`