`\text{a)}`
`49 .15 - 5 .49`
`= 49(15 -5)`
`= 49 . 10`
`= 490`
`\text{b)}`
`43 . 16 - 43 .13`
`= 43(16 - 13)`
`= 43 . 3 `
`=129`
`\text{c)}`
`23 . 51 + 35 . 51 - 51.18`
`= 52(23+35-18)`
`= 52 .40`
`= 2080`
`\text{d)}`
`13 . 52 + 52 . 36 - 19 . 52`
`= 52(13+36-19)`
`= 52 . 30`
`= 1560`
`\text{e)}`
`98 . 36`
`= 98(30+6)`
`= 98 . 30 + 98 . 6`
`= 2940 + 588`
`= 3528`
`\text{f)}`
`999 . 201`
`= 999(200+1)`
`= 999 . 200 +999`
`= 199800 +999`
`= 200799`
`\text{g)}`
`98 . 37`
`= 98(30+7)`
`= 98 .30+98 .7`
`=2940 + 686`
`= 3626`
`\text{h)}`
`9999 . 201`
`= 9999(200+1)`
`= 9999 . 200 + 9999`
`= 1999800 + 9999`
`=2009799`