Answer:
18 , 18.901036
Step-by-step explanation:
3.052 * 6.193
estimate : 3 * 6 = 18
actual answer : 3.052 * 6.193 = 18.901036
0
1/2 * 2 is 1. 1 - 1 is 0
Have a great day/night!
357+421 = 778
Hope this helps :)