Math Focus 2
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# Surf for More Math

## CHAPTER 6: NUMBER TO 100

### Lesson 4: Estimating Quantities

Use these interactive activities to encourage students to have fun on the Web while learning about numbers up to 100. Students can try these activities on their own or in pairs.

Goal

Estimate, count, and compare quantities to 100 using 10-frames.
[C, CN, ME, R, V]

Instructions for Use

Ten Frame Game has students estimate the number of dots using 10-frames.

To use Ten Frame Game, click Start. Estimate the number of dots in the left-hand column. Then repeatedly click on the 10-frame icon to create the number of 10-frames you think will be needed to hold all the dots. (To change the number of 10-frames, click Clear.) Next, click Done to see how accurate your estimate was. You can then choose to see the total number of dots, change the number of dots, or try again with the same number of dots.

Ten Frame allows student to become familiar with a 10-frame.

To use Ten Frame, choose one of the four games listed on the left:
1. How Many: Enter the number of circles shown or the number of empty squares shown.
2. Build: Drag the number of circles needed to fill the frame then click Done.
3. Fill: Determine how many circles are needed to fill the remaining squares.
4. Add: Drag circles to complete addition problems. Click Done after each step.

You may choose Play All from the Games menu. The four games will be played at random. Click Next to go on to the next problem.

Circles, ladybugs, stars, or apples can be selected from the list of items in the top left of the screen.