| 1. | How do we multiply a whole number by a power of 10?
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36 × 10
Add on as many 0's as appear in the power.
| Examples. | 36 × 10 | = | 360 | | Add on one 0. | | | 36 × 100 | = | 3600 | | Add on two 0's. | | | 36 × 1000 | = | 36,000 | | Add on three 0's. |
| 2. | How do we divide a whole number by a power of 10?
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36,000 ÷ 10
Subtract as many 0's as appear in the power. Examples. | 36,000 ÷ 10 | = 3,600 | Subtract one zero. | | 36,000 ÷ 100 | = 360 | Subtract two zeros. | | 36,000 ÷ 1000 | = 36 | Subtract three zeros. |
3. How many 10's are in 46,200? (Remember this is not "What number is in the tens place?)
If I only had 10 blocks how many would I need to make this number? Examples. | There are | 4,620 10's in 46,200? | Take away the digit in the ones place.
| | There are | 462 100's in 46,200
| Take away the digit in the ones place and the tens place. | | There are | 46 1000's in 46,200 | Take away the digit in the ones place, tens place and hundreds place. |
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