L 41

L 41

What is place value? 位值

• Place value is the value of each digit in a number.

• For example, the 5 in 350 represents 5 tens, or 50; however, the 5 in 5,006 represents 5 thousands, or 5,000.

Place value chart

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Multiple Choice

what is the place value of the digit 3 in the number 345 ?

• 300

• 3

• tens

• hundreds

Multiple Choice

what is the place value of the digit 2 in the number 312 ?

• 2

• ones

• tens

• hundreds

Multiple Choice

what is the place value of the digit 4 in the number 540 ?

• 40

• 4

• tens

• ones

What is Expanded Form 展开式？

• In the expanded form. we break up a number according to their place value and expand it to show the value of each .

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• 345 = 300+40+5

• 56= 50+6

Multiple Choice

which one is the expand form of 357 ?

• 357= 3+5+7

• 357= 30+50+7

• 357= 300+57

• 357= 300+50+7

Multiple Choice

which one is the expand form of 785 ?

• 785 = 700+80+5

• 785 = 700+85

• 785= 700+50+8

• 785= 700+8+5