Тема: Округлення до десятків
Continue to do the hill problems with the following numbers. Model for the first three with student input, then continue with guided practice, or have students do the last three in pairs:
12
28
31
49
86
73
What should we do with a number like 35? Discuss this as a class, and refer back to Sheila’s problem at the beginning. The “rule” is that we round to the next highest 10, even though the five is exactly in the middle.
Have students do six problems like the ones in class. Offer an extension for students who are already doing well, to round the following numbers to the nearest 10:
151
189
234
185
347
Make up and write down your own problems on rounding and read them out for the rest of the class to solve.
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