This morning in Math we welcomed Mrs. Jones, one of our school division's Numeracy coaches. Working in pairs, we explored how to represent decimal numbers using base-ten blocks.
The centaine, dizaine and unité blocks we are used to "transformed" into unité, dixième and centième blocks for this task.
We estimated that the answer would be between 12 and 15 because 4x3=12 and 5x3=15.
To find the actual answer, we started by building the number and then replicating the number into the required number of groups. From there, we looked at how many of each type of blocks we had and if any switches could be made. 10 centièmes (hundredths) = 1 dixième (tenth). 10 dixièmes (tenths) = 1 unité (one).
After completing all switches, we counted what we had. 4,78 x 3 = 14,32!
Please ask me about this morning's Math-tivity. What did I notice? How can we switch one set of blocks to represent another? What did I find challenging? Did I have an "A HA!" moment?
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