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On the Move: Mass Migrations  

 

 

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1. Three urchins are on a rock. If there are 6 rocks, each with 3 urchins, how many urchins are there?
    15
    18
    21
 
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2. 10 hermit crabs crawl along the beach. If a wave catches 3 and sweeps them away, how many are left on the sand?
    6
    7
    13
 
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3. Six Carolina wrens each lay 5 eggs in their nests. How many eggs are there?
    30
    35
    11
 
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4. Four elf owls perch on their cactus. If one flies off to hunt, how many are left?
    5
    4
    3
 
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5. An octopus has 8 legs. If there are 2 octopi on the page, how many legs are there in all?
    16
    12
    8
 
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6. 7 woodpecker finches each eat 4 worms. How many worms have been eaten?
    28
    21
    14
 
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7. 2 rhinos stomp across the savanna. Each rhino has 4 legs. How many legs are there in all?
    4
    6
    8
 
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8. Five hundred termites build a mound. If three hundred leave to form a new colony, how many are left?
    100
    200
    300
 
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9. Four bromiliads grow on a branch. If three tadpoles swim in each bromiliad, how many tadpoles are there?
    7
    12
    15
 
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10. Four elephants munch on leaves. If eight more join, how many are in the herd?
    10
    12
    32
 
   
 



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