Lesson 1 2 estimating
- 1. Name _______________________________________ Date _________________________ Mrs. Labuski / Mrs. Rooney Estimating with Whole Numbers Estimates are close to the exact number but are usually easier and faster to find. Round the numbers in a problem to numbers that are close and they can help you do the math mentally. Remember when rounding: underline the place value look to the right numbers 1-4 stay where they are numbers 5-9 round up Addition Subtraction 5,439 62,167 +7516 -47,511 Multiplication Division 27 120÷ 65 x9
- 3. Name _______________________________________ Date _________________________ Mrs. Labuski / Mrs. Rooney Estimating with Whole Numbers Estimates are close to the exact number but are usually easier and faster to find. Round the numbers in a problem to numbers that are close and they can help you do the math mentally. Remember when rounding: underline the place value Remember to estimate look to the right first, then perform the numbers 1-4 stay where they are operation (+, -, x ÷) numbers 5-9 round up Addition Subtraction 5,439 5,000 62,16760,000 +7,516 8,000 -47,51150,000 13,000 10,000 Multiplication Division 27 30 120÷ 65 x9 9 270 120 ÷ 60 = 2