# © 2007 M. Tallman. Find your number. Look right next door. 34 Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the.

## Presentation on theme: "© 2007 M. Tallman. Find your number. Look right next door. 34 Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the."— Presentation transcript:

Find your number. Look right next door. 34 Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the place on the right. Round to the nearest thousands place., 8 9

000 3 8 9 Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the place on the right. Step 3: If the number is four or less, then the circled number stays the same. Step 4: All numbers to the right of the circled number become zeros. 4 or less, just ignore. 3 is less than 4 Just Ignore! 4, Round to the nearest thousands place.

© 2007 M. Tallman 7 Find your number. Round to the nearest hundreds place. Look right next door. Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the place on the right. 53, 1

© 2007 M. Tallman 65 Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the place on the right. Step 3: If the number is four or less, then the circled number stays the same. Step 4: If the number is 5 or greater then add 1 to the circled number. Step 5: All numbers to the right of the circled number become zeros. 0 0 7 1 4 or less, just ignore. 5 or more, add 1 more. 7 is not less than 4 Round to the nearest hundreds place. 5 + 1 = 6 3,

© 2007 M. Tallman 0 0 72 × 47 7 5 × = 3 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round 72 and 47 to the nearest ten. Step 3: “Box” and solve the basic math fact. Step 4: Count the zeros in both factors. Place the zeros in the product. 0 5 2 1 1 The actual answer is 3,384, so our estimation is pretty accurate. 0 2,

© 2007 M. Tallman 00 0 578 × 63 6 6 × = 3 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round 578 to the nearest hundred and 63 to the nearest ten. Step 3: “Box” and solve the basic math fact. Step 4: Count the zeros in both factors. Place the zeros in the product. 0 6 3 1 1 0 2, 2 0 3 The actual answer is 36,414, so our estimation is pretty accurate.

© 2007 M. Tallman 0 0 \$45 × 785 \$5 8 × = \$4 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round \$45 to the nearest dollar and 785 to the nearest hundred. Step 3: “Box” and solve the basic math fact. Step 4: Count the zeros in both factors. Place the zeros in the product. 00 0 3 1 1 0 2, 2 0 3

© 2007 M. Tallman 0 0 57 × 7,342 6 7 × = 4 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round 57 to the nearest ten and 7,342 to the nearest thousand. Step 3: “Box” and solve the basic math fact. Step 4: Count the zeros in both factors. Place the zeros in the product.,000 2 3 1 1 0 2, 2 0 3 4 0 4

© 2007 M. Tallman 00 0 435 × 289 4 3 × = 1 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round 435 and 289 to the nearest hundred. Step 3: “Box” and solve the basic math fact. Step 4: Count the zeros in both factors. Place the zeros in the product. 2 3 1 1 0 2, 2 0 3 4 0 4

© 2007 M. Tallman 1. \$21.89 × \$6.78 5,000 50,000 100× 500 = 560,000 800 × 700 = \$140.00 4. 4,897 × 598 3. 145 × 467 Estimate Each Product 2. 767 × 721 \$20.00 × \$7.00 = 300,000 × 600 =

© 2007 M. Tallman 5. 92 × 2,228 \$2,000 4,000,000 8,000× 500 = \$49,000 \$70 × 700 = 180,000 8. \$2,197 × 45 7. 8,432 × 467 Estimate Each Product 6. \$72 × 679 9090 × 2,000 = \$100,000 × 5050 =

© 2007 M. Tallman 9. 789 × 567 9,000 240,000 3,000× 8080 = 180,000 3030 × \$9,000 = 480,000 12. 8,813 × 98 11. 3,467 × 77 Estimate Each Product 10. 27 × \$8,567 800 × 600 = 900,000 × 100 =

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