Add 1 hundred's place block to 20 ten's place blocks to 15 one's place blocks.
(1 X 100) + (20 X 10) + (15 X 1) = 100 + 200 + 15 = 315 and you used 36 blocks.
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(2x100)+(15x4)+(7x1)=200+60+7=267
How do you draw 2.6, 0.47, and 1.05 with base ten blocks ??
3 tens 1 tens 5 ones
No. In that case it is 0.0
No, it's impossible. If you did it with hundredths blocks then it would be fair.