13.2 Estimating

13.2 Estimating

What is estimating?

Estimating is giving a sensible guess of ‘how many’ there are of something.

Multiple Choice

Count on in two : 76, 78, 80, 82, ... , ...

• 81, 80

• 84, 86

Multiple Choice

Count on in five : 110, 115, 120, 125, ... , ...

• 130, 135

• 130, 131

Multiple Choice

Count on in one : 777, 778, 779, 780, ... , ...

• 782, 784

• 781, 782

Multiple Choice

Count back in one : 400, 399, 398, 397, 396, ... , ...

• 395, 394

• 386, 376

Multiple Choice

count back in five : 80, 75, 70, 65, ... , ...

• 60, 55

• 70, 75

Multiple Choice

Count on in 10 : 84, 94, 104, 114, ... , ...

• 134, 144

• 124, 134

Multiple Choice

Count back in 10 : 129, 119, 109, ... , ...

• 99, 89

• 89, 79

If in the 1st jar there are 100 candy, can you estimate how many candy are there in the 2nd jar?

There are 100 candy in the 1st jar. In the 2nd jar there are half candy from the 1st.

In the jar number 1 there are 200 marbles. estimate how many marbles are there in the jar 2?

Jar number 2 is half of the jar number 1, so there are 100 marbles there

Multiple Choice

Do you remember fraction? what fraction does the color part show?

Multiple Choice

What fraction does the colored part show?

Poll

On the the first jar there are 200 marbles. can you estimate how many marbles are there in the 2nd jar?

• between 100-150

• between 0-50

• between 50-100

• between 150-200