By Marvin L. Bittinger
The Bittinger sequence replaced the face of developmental schooling with the advent of objective-based worktexts that awarded math one suggestion at a time. This strategy allowed readers to appreciate the explanation in the back of each one suggestion earlier than training the linked talents after which relocating directly to the following subject. With this revision, Marv Bittinger keeps to target construction luck via conceptual figuring out, whereas additionally assisting readers with caliber functions, routines, and new overview and research fabrics to assist scholars follow and maintain their wisdom.
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Additional resources for Developmental Mathematics, 8th Edition
9 7 ͤ 6 3 4 1 6 3 4 Think: 63 , 7 = 9. The first digit in the quotient is 9. We do not write the 0 when we find 63 - 63. Bring down the 4. 9 0 7 ͤ 6 3 4 1 6 3 4 1 Think: 4 , 7. , from 4, we do not get a whole number, so the next digit in the quotient is 0. Bring down the 1. 9 0 5 7 ͤ 6 3 4 1 6 3 4 1 3 5 6 Think: 41 , 7. We try 5. Multiply 7 # 5 and subtract. The remainder is 6. Divide. 30. 6 ͤ 4 8 4 6 The answer is 905 R 6. Do Exercises 30 and 31. 31. 7 ͤ 7 6 1 6 EXAMPLE 10 Divide: 8169 , 34. Because 34 is close to 30, we think of the divisor as 30 when we make our choices of digits in the quotient.
Estimate, by rounding to the nearest ten, the total cost of 12 ovens. The next two examples show how estimating can be used in making a purchase. EXAMPLE 22 Microwave Ovens. Ellen manages a small apartment building and is planning to purchase a new over-the-range microwave oven for each of the 12 units in the building. One model that she is considering costs $248. Estimate, by rounding to the nearest ten, the total cost of the purchase. We have 2 5 0 * 1 0 2 5 0 0. The microwave ovens will cost about $2500.
This is also 1 hundred + 7 tens. Write 7 in the tens column and 1 above the hundreds. 8 5 3 Add hundreds. We get 18 hundreds, or 10 hundreds + 8 hundreds. This is also 1 thousand + 8 hundreds. Write 8 in the hundreds column and 1 above the thousands. 8 5 3 Add thousands. We get 11 thousands. We show you these steps for explanation. You need write only this. STUDY TIPS One of the most important ways in which to improve your math study skills is to learn the proper use of the textbook. Here we highlight a few points that we consider most helpful.