Practice 4
Calculate using simple methods
1. $995+98+7$
$698+595+497+10$
2. $993+996+999+15$
$198+197+196+10$
3. $998+995+97+15$
$1998+997+98+7$
Practice 4
1. $1100 \quad 1800$
2. 3003
601
3. $2105 \quad 3100$