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Tham khảo tài liệu 'symbols of addition 6', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | ------------------------------------- THEA MATH REVIEW --------------------------------------- Then add the 1 pound to the 4 pounds 4 pounds 25 ounces 4 pounds 1 pound 9 ounces 5 pounds 9 ounces Subtraction with Measurements 1. Subtract like units if possible. 2. If not regroup units to allow for subtraction. 3. Write the answer in simplest form. For example 6 pounds 2 ounces subtracted from 9 pounds 10 ounces. 9 lb 10 oz Subtract ounces from ounces. - 6 lb 2 oz Then subtract pounds from pounds. 3 lb 8 oz Sometimes it is necessary to regroup units when subtracting. Example Subtract 3 yards 2 feet from 5 yards 1 foot. Because 2 feet cannot be taken from 1 foot regroup 1 yard from the 5 yards and convert the 1 yard to 3 feet. Add 3 feet to 1 foot. Then subtract feet from feet and yards from yards 5 vd I ft - 3 yd 2 ft 1 yd 2ft 5 yards 1 foot - 3 yards 2 feet 1 yard 2 feet Multiplication with Measurements 1. Multiply like units if units are involved. 2. Simplify the answer. Example Multiply 5 feet 7 inches by 3. 5 ft 7 in Multiply 7 inches by 3 then multiply 5 feet by 3. Keep the units separate. X 3 15 ft 21 in Since 12 inches 1 foot simplify 21 inches. 15 ft 21 in 15 ft 1 ft 9 in 16 ft 9 in 115 ---------------------------------- THEA MATH REVIEW ------------------------------------- Example Multiply 9 feet by 4 yards. First decide on a common unit either change the 9 feet to yards or change the 4 yards to feet. Both options are explained below Option 1 To change yards to feet multiply the number of feet in a yard 3 by the number of yards in this problem 4 . 3 feet in a yard X 4 yards 12 feet Then multiply 9 feet X 12 feet 108 square feet. Note feet X feet square feet ft2 Option 2 To change feet to yards divide the number of feet given 9 by the number of feet in a yard 3 . 9 feet 3 feet in a yard 3 yards Then multiply 3 yards by 4 yards 12 square yards. Note yards yards square yards yd2 Division with Measurements 1. Divide into the larger units first. 2. Convert the .
