Page 40 - NUMINO TG_3A

012_G3U2_TG_CA 2011.4.6 12:30 PM ˘ ` 023 PDF_In 2540DPI 150LPI T

02Find the Red Ball Unit

3 . Compare 4,747 and 4,528 using the number line below. 3. Have students mark the two numbers on
the number line. Explain that numbers on the
Mark 2 numbers on the number line. right are bigger than numbers on the left. This
will help them find the answer.
Which number is to the right? Which number is greater?

4,528 4,747

4,500 4,550 4,600 4,650 4,700 4,750 4,800

4. Have students use a place-value chart to

wrap up the way of comparing 4-digit

number.

4 . Compare 6,513 and 6,520 using a place-value chart. Fill in the blanks. Refer to .

Explain how you used a place-value chart to find the greater 4-digit 6,513 6,520

number. 6 thousand 6 thousand

Thousands Hundreds Tens Ones 5 hundreds 5 hundreds
6, 5 1 3
6, 5 2 0 1 tens 2 tens
So, 6,513 6,520

Thousands are the same. same
Hundreds are the same.
So, 6,520 > 6,513 5. Have students compare the numbers
1 ten is less than
2 tens. without using model blocks.

5b.

7,543 7,567

7,543 7,567

5 . Compare the 2 numbers and write > or < in the . same

a. b. 4 6, so: 7,543 7,567
9,410 > 6,791 7,543
< 7,567

2. Find the Red Ball 15

Comparing 4-Digit Numbers It might be confusing for students to compare
When comparing 4-digit numbers, compare the numbers that use the same number multiple times
numbers in the thousands, hundreds, and ones (3,308, 3,803, and 3,838). Have them use a place-
place in the order. value chart.

3A Unit 02 023