Addition and Subtraction in 100

Estimate the sum of 120+190 by rounding to the nearest hundreds

• 300

• 310

• 200

• 400

Estimate the difference of 470 - 289 by rounding to the nearest hundreds

• 300

• 200

• 181

• 100

Max has 88 marbles. He trips and loses 19 marbles, how many marbles does he have now?

• 107

• 70

• 79

• 69

There are 53 regular pencils and some colored pencils in the bin. There are a total of 91 pencils in the bin. How many colored pencils are in the bin?

• 124

• 37

• 144

• 38

Mr. Fahad has 82 pencils. Then he sells 56 pencils. How many pencils does he have now?

• 24

• 25

• 26

• 27

Subtract the following numbers by rounding to the nearest 100

756 - 549 =

• 400

• 300

• 200

• 100

What is my first step when adding and subtracting?

• Go to the tens place

• Go to the hundreds place

• Go to the ones place

• Go to the thousands place

Khaled buys a bike for AED 1,423. he buys a bike helmet for AED 48. How much did Khaled spend in total?

• 1,491

• 1,546

• 1,471

• 2,471

237 fifth graders and 346 fourth graders went on a field trip. Estimate how many more fourth graders were on a field trip than fifth graders. (hint: you need to subtract!)

• 200 more

• 500 more

• 300 more

• 100 more

Estimate the sum of 57+99 by rounding to the nearest tens

• 140

• 160

• 150

• 170