`25`.`37` + `25`.`63` - `150`
= `25`. ( `37` + `63` ) - `150`
= `25`.`100` - `150`
= `2500` - `150`
= `2350`
`425`.`7`.`4` - `170`.`60`
= `425` . `7` . `4` - `170` . `15` . `4`
= `2975` . `4` - `2550` . `4`
= ( `2975` - `2550` ) . `4`
= `425` . `4`
= `1700`
`8`×`9`×`14`+`6`×`17`×`12`+`19`×`4`×`18`
=`72`×`14`+`72`×`17`+`72`×`19`
=`72`×(`14`+`17`+`19`)
=`72``x``50`
= `3600`
`120`.`97` + `120.2` + `120`
= `120`.`97` + `120.2` + `120`.`1`
= `120`.( `97` + `2` + `1` )
= `120`.`100`
= `12000`
