add and subtract 3-digits

Use the chart to solve the problem.
There is a 1 in my ones place.
There is an 8 in my tens place.
There is a 5 in my hundreds place.
Which number am I?

• 185
• 581
• 158
• 105

Draw this on your paper.

Find 281 - 161 = ?

• 121

• 132

• 120

• 122

Add the numbers in the ones place.

• 7

  + 9

  16

• 7

  + 7

  14

• 4

  + 2

  6

Add the numbers in the tens place.

• 40

  +20

  60

• 47

  +27

  74

• 400

  +300

  700

7. 7. Add the following.

• 398

• 594

• 588

Solve.

• 54

• 64

• 40

604

+ 207

_________

• 705

• 811

• 712

• 615

There are 807 visitors at the museum. If 692 visitors were children, how many adults went to the museum?

807

-692

_________

• 271

• 145

• 167

• 194