Practice problem
Write 2123212_{3}2123 in expanded notation for base 3.
2×102+1×101+2×1022 \times 10^{2} + 1 \times 10^{1} + 2 \times 10^{2}2×102+1×101+2×102
2×32+1×31+2×302 \times 3^{2} + 1 \times 3^{1} + 2 \times 3^{0}2×32+1×31+2×30
3×32+3×31+3×323 \times 3^{2} + 3 \times 3^{1} + 3 \times 3^{2}3×32+3×31+3×32
10×102+10×101+10×10210 \times 10^{2} + 10 \times 10^{1} + 10 \times 10^{2}10×102+10×101+10×102
Type a concept, like “slope” or “photosynthesis”.