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Grade 5 Math · World 5: Measure Mill · Level 47
Multiply by Powers of Ten
Watch digits shift left while the decimal point stays put.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 47
- Here's a trick that isn't a trick. Multiply 3.45 by 10, and each digit moves one place left.
- The decimal point doesn't move! It always stays between the ones and the tenths. The digits slide past it.
- 10 squared moves digits two places. 10 cubed moves them three, and zeros fill the empty places.
Georgia's K-12 Mathematics Standards:
- 5.NR.1.2 — Explain patterns in the placement of digits when multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10, up to 10³.