Answer:
2 hours B
Step-by-step explanation:
:)
Answer:
ok! keep up the good work!
Step-by-step explanation:
Answer:
-2a+6
Step-by-step explanation:
.....
Math you do in your head
example you can do 10 tiemes 3=30 in your head
that is mental math
you might have a hard time doig 19 times 23 so you would use a calulator then it would not be mental math
it's helpful if at the supermarket or at a resaurant
mental math is math done in the mind