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Grade 8 Algebra: Word Problems: Exponents

Name: ______________________Date: ____________Score: ____ / 6

Level 3

Halving, tiny numbers and comparisons

  1. 1. Solve:
    A\text{A}ball\text{ball}bounces\text{bounces}to\text{to}half\text{half}its\text{its}height\text{height}each\text{each}time.\text{time.}It\text{It}is\text{is}dropped\text{dropped}from\text{from}64\text{64}cm.\text{cm.}How\text{How}high\text{high}does\text{does}it\text{it}bounce\text{bounce}after\text{after}4\text{4}bounces?\text{bounces?}
  2. 2. Solve:
    A\text{A}cell\text{cell}is\text{is}10−610^{-6}\text{}meters\text{meters}long.\text{long.}How\text{How}many\text{many}cells\text{cells}laid\text{laid}end\text{end}to\text{to}end\text{end}make\text{make}1\text{1}meter?\text{meter?}
  3. 3. Solve:
    The\text{The}amount\text{amount}of\text{of}medicine\text{medicine}in\text{in}the\text{the}body\text{body}halves\text{halves}every\text{every}6\text{6}hours.\text{hours.}Starting\text{Starting}with\text{with}800\text{800}mg,\text{mg,}how\text{how}much\text{much}is\text{is}left\text{left}after\text{after}24\text{24}hours?\text{hours?}
  4. 4. Solve:
    A\text{A}cube\text{cube}has\text{has}volume\text{volume}8x6.8x^{6}\text{.}What\text{What}is\text{is}its\text{its}edge\text{edge}length?\text{length?}
  5. 5. Solve:
    Which\text{Which}is\text{is}greater,\text{greater,}2102^{10}\text{}or\text{or}103?10^{3}\text{?}By\text{By}how\text{how}much?\text{much?}
  6. 6. Solve:
    A\text{A}sheet\text{sheet}of\text{of}paper\text{paper}is\text{is}10−110^{-1}\text{}mm\text{mm}thick.\text{thick.}It\text{It}is\text{is}folded\text{folded}in\text{in}half\text{half}10\text{10}times.\text{times.}How\text{How}thick\text{thick}is\text{is}the\text{the}stack?\text{stack?}