Estimating Products.power point lesson 3

Math 4

2. Estimating
Products

he
¡WA

3. Y >
Ina big library, there are

1278 books in a shelf’ About
how many books are there in
16 shelves of the same size?

4. The word ABOUT in
the problem tells that you

do not need the exact
answer,

5. but, what you

need is just an
ESTIMATE.

6. How to estimate the

product?

7. STEP 1:

Round of the factors

to their greatest place

8. Ina big library, there are
1278 books in a shelf. About
how many books are there in
16 shelves of the same size?

9. Mi.
TS Pr. * y)
Fy
f Pr eae} An
=)

Ina big library, there are
1278 books in a shelf’ About &
how many books are there in |
16 shelves of the same size?

10. Y Mathematical Sentence:

1278x16=N IN

12. STEP 1:

Round of the factors

to their greatest place

16. What to do with the

rounded-off

numbers?

17. Multiply the
rounded-off
numbers. N

18. 00

1278— 10

19. The value of

3775 X 22 is

22. 00

3775— 40

24. The value of

5 106 X 26 is
about _.

26. O «see sone

/ /