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G5 Word Cards T2

Add and Subtract Decimals Realize

TermDefinition
compatible numbers ______________________are numbers that are easy to compute with mentally. Estimate 547 + 294 and 547 − 294. 547 is about 550; 294 is about 300. 547 + 294 is about 550 + 300 = 850. 547 − 294 is about 550 − 300 = 250.
Associative Property of Addition The_________________________ states that addends can be regrouped and the sum remains the same. 243 + (157 + 732) = (243 + 157) + 732 243 + 889 = 400 + 732 1,132 = 1,132
Commutative Property of Addition The_________________________ states that addends can be added in any order and the sum remains the same 6,283 + 4,129 = 4,129 + 6,283 10,412 = 10,412
compensation _____________________ is adjusting one or more numbers to make a computation easier and balancing the adjustment by changing the sum or difference. Find 648 + 325. Add 2 650 + 325 = 975 Subtract 2 So, 648 + 325 = 973
Mr. O'Berc Zach's hero 1 + 1 =2
Created by: Mr OBerc
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