By Rebecca Wingard-Nelson
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RETRACTILADO unique, EXCELENTE, DE MÉXICO CON AMOR MISMO DÍA SI RECIBO SU PEDIDO POR l. a. MAÑANA EN DÍAS HÁBILES
To be used with the IB degree Programme
Additional info for Addition Made Easy (Making Math Easy)
Add just as you would any one-digit number. 2 hours 22 minutes ϩ 5 hours 10 minutes 7 hours 32 minutes The sum of 2 hours 22 minutes ϩ 5 hours 10 minutes is 7 hours 32 minutes. 40 Time Time values can be regrouped. 2 hours 45 minutes ϩ 8 hours 20 minutes Add minutes first. Since 65 minutes is more than 1 hour, regroup. 2 hours 45 minutes ϩ 8 hours 20 minutes 65 minutes 65 minutes ϭ 60 minutes ϩ 5 minutes. A group of 60 minutes can be regrouped as 1 hour. 60 minutes = 1 hour Write 5 minutes in the the minutes column.
Key words for addition problems are listed in the table below. Addition Key Words add combined more than additional exceeds plus all gain raise all together greater sum and in addition to together both in all total 42 Key Words You can use key words to change a word problem into a math problem. Trisha’s class collected bottles for recycling. The first week they collected 21 bottles. The second week they collected 55 bottles. How many bottles did they collect all together? The key words “all together” tell you to add the number of bottles.
2 Decide how you can solve the problem. The key words “in all” tell you that you can add to solve the problem. 3 Solve the problem. Add the number of cars at home to the number of cars at the yard sale. 1 17 cars at home ϩ 9 cars at the yard sale 26 cars in all 4 Check your work. Make sure you have answered the right question, and check your addition for mistakes. 45 Further Reading Creative Teaching Press. Addition and Subtraction Facts to 20. : Creative Teaching Press, 2002. Helakoski, Leslie, and Sal Murdocca.
Addition Made Easy (Making Math Easy) by Rebecca Wingard-Nelson