Subtraction and Base Ten

Estimate. Round to the nearest 10.

1,253 - 1008

• 100

• 120

• 300

• 240

Subtract.

2,721 - 1,023

• 1,678

• 1,698

• 1,700

• 1,640

Subtract.

6,821 - 4,934

• 1,987

• 1,787

• 1,387

• 1,887

Subtract.

9,735 - 6,821

• 2,914

• 3,914

• 1,914

• 2,947

   $5,277
 -$2,568
̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅

• $2,709

• $2,711

• $3,311

• 1234

$8.00
- $2.17
̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ ̅ 

• $5.83

• $583

• $6.17

• $10.17

What is the best estimate of the difference rounded to the nearest hundred?
812 - 356

• 400

• 475

• 450

• 500

I have 18 pieces of gum. I give 3 pieces to Mr. Arthur, two pieces to my brother, and four pieces to my sister. How many pieces of gum do I have left?

• 9 pieces

• 10 pieces

• 18 pieces

• none

Jackson saved $1,254 last year. He wants to buy an iPad for $599, an iPad case for $88, and an extra charger for $125. If he purchases the iPad and accessories, how much money will he have left over?

• $424

• $655

• $442

• $507

Cynthia had 542 Lego blocks in her 'Lego City' cartoon set. She gave 235 blocks to Kaiden for his 'Lego Ninjago' cartoon set. How many hundreds of Lego blocks does Cynthia have left in her 'Lego City' cartoon set?

• 2

• 3

• 4

• 5

Answer explanation

Cynthia has 542 Lego blocks and gave 235 to Kaiden. Subtracting 235 from 542 gives 307. Since 307 is more than 300, Cynthia has 3 hundreds of Lego blocks left in her 'Lego City' cartoon set. Therefore, the correct answer is 3.