5.42-18:32
=5.16-18:9
=80-2
=78
33.18-32
=27.18-9
=486-9
=477
39.213+84.39
=39.(213+8)
=39.297
=11583
80-[130-(12-4)2]
=80-(130-82)
=80-(130-64)
=80-66
=14
1. 5.42-18:32
= 5.16-18:9
= 80-2
= 78
2. 33.18-32
= 32.(3.18-1)
= 9.53
= 477
3. 39.213+84.39
= 39.(213+84)
= 39.297
= 11583
4. 80-[130-(12-4)2 ]
= 80-(130-82)
= 80-(130-64)
= 80-66
= 14