Gr3_Estimate the sum

Gr3_Estimate the sum_ALL

Multiple Choice

Ms. Almy is 28 years old. How old is Ms. Almy rounded to the nearest 10? Is it right to round the age?

• 10

• 20

• 30, No we shouldnt round the age.

• 999,999,999,999,999

Multiple Choice

What is 346 rounded to the nearest hundred?

• 340

• 300

• 350

• 400

Multiple Choice

Which of these numbers rounds to 400 when rounded to the nearest 100?

• 342

• 476

• 362

• 451

Multiple Choice

can round 45 to the thnearest ten?

• yes we can

• No we shouldnt.

LEARNING OBJECTIVE

Apply estimation to solve problems based on addition​

GP

• ESTIMATE 23 + 42

Poll

Quick check :

Jamil and Izaan are asked to estimate the sum of 345 + 670 by rounding to the nearest ten.

Jamil adds the numbers and then rounds the answer.

Izaan rounds the addends and then adds the rounded number.

Whose method of estimation is right?

• Jamil

• Izaan

TASKS

• Estimate the sum rounding to the nearest 10 

  234 + 334 

• Use the numbers given below to make two calculations with an estimated sum of 250 by rounding them to nearest ten. 

   

    169, 206, 

    42, 79. 

   

• Match the best possible estimation. 

   345 + 273  

  340 + 280 

  350 + 280 

  350 + 270 

Open Ended

Task 4: Open ended Question

The estimated answer to a calculation is 400,

Given any possible three pairs of numbers when rounded to the nearest ten and added will give the answer as 400.

Poll

How well did you understand the lesson.

• Crystal clear

• I need to practice more

• I need more help

• i am confused.