tailieunhanh - Symbols of addition 1

Tham khảo tài liệu 'symbols of addition 1', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | ------------------------------------ THEA MATH REVIEW ------------------------------------------ 2. Continue dividing. Bring down the 4 from the ones place in the dividend. How many times does 3 divide 24 Write the answer 8 directly above the 4 in the dividend. Since 3 X 8 24 write 24 below the other 24 and subtract 24 - 24 0. 18 3 54 -3ị 24 -24 0 Remainders If you get a number other than zero after your last subtraction this number is your remainder. Example 9 divided by 4. 2 4J9 -8 1 1 is the remainder. The answer is 2 r1. This answer can also be written as 2 4 since there was one part left over out of the four parts needed to make a whole. Working with Integers Remember an integer is a whole number or its opposite. Here are some rules for working with integers Adding Adding numbers with the same sign results in a sum of the same sign positive positive positive and negative negative negative When adding numbers of different signs follow this two-step process 1. Subtract the positive values of the numbers. Positive values are the values of the numbers without any signs. 2. Keep the sign of the number with the larger positive value. 90 ----------------------------------- THEA MATH REVIEW ---------------------------------------- Example -2 3 1. Subtract the positive values of the numbers 3 - 2 1. 2. The number 3 is the larger of the two positive values. Its sign in the original example was positive so the sign of the answer is positive. The answer is positive 1. Example 8 -11 1. Subtract the positive values of the numbers 11 - 8 3. 2. The number 11 is the larger of the two positive values. Its sign in the original example was negative so the sign of the answer is negative. The answer is negative 3. Subtracting When subtracting integers change all subtraction signs to addition signs and change the sign of the number being subtracted to its opposite. Then follow the rules for addition. Examples 10 - 12 10 -12 -2 -5 - -7 -5 7 2 Multiplying and Dividing A simple method