P4_Numbers to 100 000.pptxnjhufyftydtstr

bhyfduyfj

1. Lesson 1 Numbers to 100 000 Reading & writing 5-digit numbers 1000 = one thousand 10 000 = 10 thousand (ten thousand) 100 000 = 1 hundred thousand (one hundred thousand) Example 1: Q: How to write 23 567 in words? A: Twenty-three thousand, five hundred and sixty-seven.

2. Example 2: Q: How to write sixty-four thousand, five hundred and twent -eight ? A: Example 4: Find the missing numbers! a. 203 415 = 200 000 + ..... + 3 000 + ..... + 10 + 5 b. 234 567 = ..... + 30 000 + ..... + ..... + ..... + 7 Example 3: Q: write in figures please! ten thousand, seven hundred and thirty-two. A: 64. 528 10 732.

3. Example 4: Q: Write the place and value of each digit in the number 657 128 ! A: Digit Place Value 6 hundred thousands 600 000 5 ten thousands 50 000 7 thousands 7 000 1 hundreds 100 2 tens 20 8 ones 8

4. Question 2: How to write sixty-one thousand, three hundred and eighty-five in numerals? Question 1: How to write 43 526 in words? Question 3: Find the missing numbers! 578 264 = 674 215 =

5. Comparing and ordering numbers to 100 000 Example: Using a place value chart. Ten Thousands Thousands Hundreds Tens Ones 9 3 8 5 9 6 1 5 Compare the ten thousands. The ten thousand are equal Compare the thousands. 3 thousands is smaller than 6 thousands. 93 085 is smaller than 96 105. 96 205 is greater than 93 085.

6. Arrange the numbers in increasing and decreasing order Example: Arrange these numbers in increasing order Ten Thousands Thousands Hundreds Tens Ones 9 3 8 5 9 6 1 5 Compare the ten thousands. The ten thousand are equal Compare the thousands. 3 thousands is smaller than 6 thousands. 93 085, 96 105. 93 085 96 105

7. Number Patterns

8. Rounding and estimation Example 1: Round to the nearest ten. Look at the digit in the ones place. If it is 1, 2, 3 or 4, round to the smaller ten. If it s 5, 6, 7, 8 or 9, round to the greater ten. Q :Round 42 to the nearest ten. A : 42 is 40 when rounded to the nearest ten. 42  

9. Example 2 Round to the nearest hundred Look at the digit in the tens place. If it is 1, 2, 3 or 4, round to the smaller hundred. If it is 5, 6, 7, 8 or 9 round to the greater hundred. Q : round 1387 to the nearest hundred A : 1387 is 1400 when is rounded to the nearest hundred. 1387  

10. Example 3 Round to the nearest thousand Look at the digit in the hundreds place. If it is 1, 2, 3 or 4, round to the smaller thousand. If it is 5, 6, 7, 8 or 9, round to the greater thousand. Q : round 7300 to the nearest thousand. A : 7300 is 7000 when rounded to the nearest thousand 7300 7000