It helps them when they have either really big numbers or really small numbers and so they don't have to use so many zeroes
Answer:
300 inches cubed
Step-by-step explanation:
Attached is an image of the explanation. Sorry about the handwriting I was trying to write fast.
Answer:
n=0.64
Step-by-step explanation:
Use the inverse opperation.
You have to divide 0.4 by 5/8. Since 5/8 is equal to 0.625, you divide 0.4 by 0.625, which equals 0.64.
To check over, you put 0.64 into the equation. 0.64x0.625=0.4
80*t+70*t=50
t = .33 hours =20 minutes
This assumes the trains are going opposite directions (opposite tracks so I’m assuming opposite directions)
Answer:
1. 4x5÷3 is a pair with 4x3÷5
2. 5x 4/3 is a pair with 5x3÷4
3. 3x 5/4 is a pair with 4x 3/5