ESTIMATING MULTIPLYINGChapter 1 Lesson 1

1: ESTIMATIONAsk: What am I being asked in this problem?1. Look at the largest number.

Estimate it to the nearest 10.2. Keep the smallest number

the same.3. Multiply both numbers.

20 x 3 =Now, multiply 20 x 3 . When you estimate, you get a very close answer to the exact answer.

2: GET YOUR PRODUCTIf the big number is over 70, round it to 100. That’s the big number. Its important.

When you get your product, that is your answer.

Ask:How can I check my work in order to

know that my answer is correct?What is the opposite of

multiplication?

GOT IT?

In a car shop, Bill wants to buy 8 cars. Each car requires 2 bottles of liquid oil. About how many bottles of oil will bob need?

Try these different problems and work them out, if you have any problems, ask a teacher for help.