Topic 2 Review

How could you estimate4,789 + 3,153

• Estimating makes problems easier!Round first, then add!

4,789 + 3,153

Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name!

5,000 3,000+

8,000

How could you estimate this to the nearest thousand?15,165 + 24,986


15,165 + 24,986


15,000 25,000+

40,000

How could you estimate this to the nearest thousand?8,722 + 16,110


8,722 + 16,110


9,000 16,000+

25,000

How could you estimate this to the nearest thousand?16,056 – 14,896

• Estimating makes problems easier!Round first, then subtract!

16,056 – 14,896


16,000 15,000-

1,000

How could you estimate this to the nearest whole number?9.63 + 4.25


9.63 + 4.25


10.00 4.00+

14

This means the 1’s place!

How could you estimate this to the nearest whole number?12.34 – 8.69


12.34 - 8.69


12.00 9.00-

3


How could you estimate this to the nearest whole dollar?$3.65 - $1.36


$3.65 - $1.36


$4.00 $1.00-

$3.00


How could you estimate this to the nearest whole number?320.08 – 114.56


320.08 – 114.56


320.00 115.00-

205.00


Round this number to the nearest tenth.

12.6512.70 or 12.7


24.4324.40 or 24.4


13.2713.30 or 13.3


8.598.60 or 8.6

You can add and subtract numbers with decimals!

What are the three rules?(This is my boring guy voice talking!)

1. LINE UP THE DECIMALS!2. Add or subtract normally.3. Make sure you have the decimal

in the answer.

You can do it!

2.6 + .14

2 614

0+

472

You can do it!

1.52 + 1.61

1 56

1

2+

3131 1

3.13

You can do it!

1.54 – 0.36

1 53

4

4-

8110 6

1.18

14

You can do it!

1.26 – 0.18

1 21

1

6-

8010 8

1.08

16

WHOLE

PART PART

5 fruit

3 apples 2 oranges

WHOLE

PART PART

7 pets

3 dogs 4 cats

WHOLE

PART PART

$3.35 cost

$.85 for coke $2.50 for chips

What do I know?So what can I figure out?

http://www.mathplayground.com/PartPartWhole.html

Here’s a fun game you can play to practice more!

http://www.mathplayground.com/PartPartWhole.html

B.A.S.OTeach your parent or sibling all about a way we can practice borrowing in a subtraction problem!

3 0 5 1

- 1 4 8 2You have to borrow from mom!

So now mom only has 4 ten dollar bills, but you have 11

dollars! So you’ve borrowed, added

back….. now start over!

4 11

9

Now Mom has to borrow from Dad!

But wait! He’s broke!!Dad- Go borrow from Grandma!

2 10Now Grandma has 2 thousand-

dollar bills, and Dad has ten hundred dollar bills!

We’ve borrowed, added back, now start over!

9

Oh wait, Mom needs to borrow from Dad!

9 14

Now Dad has 9 hundred-dollar bills, and Mom has 14 ten dollar

bills!We’ve borrowed, added back,

now start over!

651 ,

There are tons of subtraction problems with borrowing on the test!

DO BASO, take your time, use your strategies, and you’ll be fine!

To practice more skills from the test, visitDaily Math on my website!

STUDY HARD & GOOD LUCK! I know you can do it!!!

Topic 2 Review

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