Lalagrl
03.07.2019 •
Mathematics
Which equation matches the graph of the greatest integer function given
below?
-8 6
20-2 0
2
4
6
8
o a. y - 1x1+3
o b. y - 1x]-3
o c. y - (+1
od. y -[x]-1
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Ответ:
We need to choose the nearest possible rounded off numbers for the estimation.
Step-by-step explanation:
Compatible numbers are the pairs of numbers which are easy to add, subtract, multiply, or divide mentally.
Example 1 (Addition)
600 + 300 = 900
The numbers 600 and 300 are compatible for addition, because the sum of 900 can be easily calculated mentally.
613 + 299 = 912
The numbers 613 and 299 are not compatible for addition, since the sum (912) cannot be easily calculated mentally. To estimate 613 + 299, replace 613 and 299 with the compatible numbers 600 and 300. An estimate of 613 + 299 is found by mentally calculating 600 + 300 = 900.
Example 2 (Subtraction)
20.4 − 3.8 = 16.6
The numbers 20.4 and 3.8 are not compatible for subtraction, since the difference (16.6) cannot be easily calculated mentally. To estimate 20.4 − 3.8, replace 20.4 and 3.8 with the compatible numbers 20 and 4. An estimate of 20.4 − 3.8 is found by mentally calculating 20 − 4 = 16.