Multiply a 3- digit number by a 1- digit number

Question

1/in a package of pencils , 8 are yellow and 4 are blue . How many yellow pencils are in 426 packages?
The answer:
4+8=12
12*426= 5,112

2/ A single pencil can draw a line equal to the length of 616 football fields! If you wanted to draw a line equal to the length of about 3,000 football fields, would you need 3,4, or 5 pencils? Explain.

3/ The school store has 3,000 pencils. They want tostock an eraser for each pencil . The eraser come in bags of 250 . The store ordered 9 bags. Will they have an eraser for each pencil? Explin
No , explain,,
250*9= 2250

Please ,, help me to solve the problem 1,2,3

Answer 1

#1 - forget about the blue pencils. There are 8 yellows in each package. So, in 426 packages, there are 8*426=3408.

Note that the title of the problem set was "Multiply a 3- digit number by a 1- digit number". That should have been a clue that your approach was wrong.

#2 - multiply and check:

3*616 = 1848
4*616 = 2464
5*616 = 3080

So, which is closest to 3000?

#3
So, whatcha think? Are 2250 erasers enough for 3000 pencils?

Answer 2

1. Why did you multiply by 4? You only need to find the total of yellow pencils.

2. 3000 / 616 = ?

3. Right.