O PERATIONS WITH D ECIMALS T O ADD OR SUBTRACT DECIMALS : 1) Line up the decimal points vertically. Fill in any 0's where necessary. 2) Add or subtract the numbers as if they were whole numbers.
• • • • • • • • • • • • • • • Understand, Add, and Subtract Decimals 5 How to The decimal point separates the whole-number places from the places less than one. Facts to Know What Is a Decimal?
SIGNIFICANT DIGITS Summary: associated with every measurement made is some degree of uncertainty. For instance, you might measure the length of the dark line shown in the diagram as 20.7 cm.
Rename 3 * 1 4 * as 2 * 5 4 * in order to subtract the numerators. To find a common denominator , find the LCM of 6 and 10. List the multiples. 6: 6, 12, 18, 24, 30 , . . . 10: 10, 20, 30 , . . .
•Regroup if a minuend (the number you subtract from) is a whole number or the fraction in a minuend is smaller than the fraction in a subtrahend (the number being subtracted). •Subtract the fractions first and then subtract the whole numbers.
Using Compensatory Numbers to Subtract - Grade Two 1 Commentary: Children broaden their view of mathematics when connections among various standards of mathematics are brought together in one learning episode.
10/28/2009 4 Add and Subtract Unlike Denominators 11 Add and Subtract Unlike Denominators •Consider adding (2/ 3) + (1/ 6)-Denominators are NOT the same •Must find the LCD between 3 and 6 3 = 3, 6 = 2 * 3 → LCD = 2 * 3 = 6-What factors in the LCM are missing from both denominators?
Positive and Negative Numbers Overview Students will be able to add, subtract, multiply, and divide using positive and negative numbers. Benchmarks 3-4 th Grade Number, Number Sense and Operations A. Use place value structure of the base-ten number system to read, write, represent and compare ...
Adding and Subtracting Whole Numbers Glencoe Texas Mathematics, Course 1. Adding and Subtracting Whole Numbers To add or subtract whole numbers, add or subtract the digits in each place-value position.
Activity Directions : In a group of two complete this worksheet. Your Bank Account Directions: Below is listed your starting balance at your bank as well as a series of withdrawals and deposits.