# © 2007 M. Tallman. Find your number. Look right next door. 23 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. 23 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. 23 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., 7 5

000 2 7 5 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. 2 is less than 4 Just Ignore! 3, Round to the nearest thousands place.

© 2007 M. Tallman 9 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. 88, 3

© 2007 M. Tallman 8 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 9 9 3 4 or less, just ignore. 5 or more, add 1 more. 9 is not less than 4 Round to the nearest hundreds place. 8 + 1 = 9 8,

© 2007 M. Tallman 9 × 47 9 5 × = 4 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round 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 0 5 1 0 1 The actual answer is 423, so our estimation is pretty accurate.

© 2007 M. Tallman The actual answer is 4,380, so our estimation is pretty accurate. 6 × 730 6 7 × = 4 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round 730 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 2, 1 0 2 2 1 0

© 2007 M. Tallman The actual answer is 2,112, so our estimation is pretty accurate. 4 × 528 4 5 × = 2 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round 528 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 0, 1 0 2 2 1 0 Tip: when adding zeros to the product, make sure that you do not count the zero in 20.

© 2007 M. Tallman The actual answer is \$538.86, so our estimation is pretty accurate. 0 00 \$76.98 × 7 7 \$8 × = 5 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round \$76.98 to the nearest ten dollar. 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. 1 0 2 2 1 0 3 0 3 \$.

© 2007 M. Tallman The actual answer is \$17.52, so our estimation is pretty accurate. 8 × \$2.19 8 \$2. × = 1 Step 1: Rounding is always first. Decide which place to round to. Step 2: Round \$2.19 to the nearest dollar. 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 6. 1 0 2 2 1 0 \$

© 2007 M. Tallman 1. 4 × 37 7 1,100 100× 11 = 3,000 500 × 6 = 160 4. 7 × 5,298 3. 145 × 11 Estimate each product. 2. 467 × 6 4 × 4040 = 35,000 × 5,000 =

© 2007 M. Tallman 5. 9 × 62,854 12 \$42,000 \$7,000× 6 = \$450.00 \$50.00 × 9 = 540,000 8. 12 × 654 7. \$6,987 × 6 Estimate each product. 6. \$47.90 × 9 9 × 60,000 = 8,400 × 700 =

© 2007 M. Tallman 5. \$8.75 × 11 5 210,000 7× 30,000 = \$3,200.00 \$400.00 × 8 = \$99.00 8. 5 × 44,987 7. 7 × 32,432 Estimate each product. 6. \$376.98 × 8 \$9.00 × 11 = 200,000 × 40,000 =

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