Place Value
?
Rounding
Estimate First;
Then Solve
Then Solve
Perimeter
100
Identify the Place of the digit 5 in
54,310
ten-thousands place
100
Sally needs 50 pencils for math this year.
Her mother gave her 18, her father gave her 14, and her brother gave her 9.
Without solving, will she have enough?
NO
20 + 15 + 10 = 45
100
Round 579 to the nearest hundred.
600
100
782 + 345 =
Estimate: 1,000 to 1,150
Answer: 1,127
100
What is the formula for perimeter?
S + S + S + S
200
Identify the Value of the digit 3 in
22,346
represents 300
200
How many inches are in 3 1/2 feet?
42 inches
200
Round 451,822 to the nearest thousand.
452,000
200
532 + 624 =
Estimate: 1,100 to 1,300
Answer: 1,156
200
What is the perimeter?
38 cm
12cm + 12cm + 7cm + 7cm
300
Identify the Place of the digit 6 in
346,590
thousands place
300
Jill needs at least 200 cupcakes for the bake sale.
If Jill bakes 72 cupcakes on Monday, 38 on Tuesday, and 154 on Wednesday. She gave 9 to her family.
Without solving, will she have enough for the bake sale?
YES
Use estimation strategies
70 + 40 + 150 = 260 - 10 = 250
300
Round 6,094 to the nearest ten thousand.
10,000
300
673 - 484 =
Estimate: 150 to 300
Answer: 189
300
What is the perimeter of a square with a side of 3 feet?
12 feet
400
Identify the Value of the digit 5 in
25,346
represents 5,000
400
Estimate the answer
678 + 725 =
must be between 1,300 and 1,450
680 + 720 = 1,400
600 + 700 = 1,300
400
Round 482 to the nearest ten.
480
400
498 - 199 =
Estimate: 200 to 300
Answer: 299
400
What is the perimeter?
60 Units
500
Identify Place of the digit 6 in
125,462
tens place
500
How many yards in 6 feet?
2 yards
3 feet = 1 yard
500
Round 57,423 to the nearest hundred thousand.
100,000
500
871 - 657 =
Estimate: 200 to 300
Answer: 214
500
What is the perimeter of a rectangle with a width of 12 inches and a length of 2 feet?
6 ft
1 ft + 1 ft + 2 ft + 2 ft
12 inches = 1 foot