Mostly Multiplication Test - Insight into the 3 Part Math ...



|Mental Math Addition Test – Grade 4 |[pic] |

|Name: ________________________ | |

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|Remember your strategies! | |

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|Banana Spit (splitting) strategy | |

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|Leap Frog (jumping) strategy | |

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|Round and Rock (moving) strategy | |

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|Break and Take (compensation) strategy | |

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|Traditional strategy | |

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|Knowledge (demonstrate understanding of concept of addition using various mental math| |

|strategies) | |

Answer the following questions using any mental math strategy (show your work!).

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Thinking level ____ Communication level ___

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3. Amanda is buying presents for her teacher.

She finds a jar of purple spotted grasshoppers for $195 and…

a wig made of genuine cobra teeth for $123.

She wants to add the two prices together (195 + 123).

She knows she needs a friendly number so she can do the work in her head.

She decides to change 195 to 200 by adding 5.

She is not sure what to do with the other number (does she add 5 or take 5 away?)

She thinks she should add 5 as well (123 + 5 = 128).

Therefore she adds 200 + 128 and gets 328.

Is she correct? Explain why or why not.

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Thinking level ____ Communication level ___

Overall: Thinking level ____ Communication level ___

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Application / Communication (Application – apply knowledge to context/problems)

(Communication – convey meaning clearly using math vocabulary)

1. Mr. Wendler is buying pickles for National Pickle Day. He needs 485 pickles to feed his hungry class. Ms. Sarte-Dance needs 353 pickles for her class. Ms. Boxer says she would also like 67 pickles for herself because she is really hungry. Ms. Christie would like 95 to feed to her guinea pigs. Using only mental math strategies, find out how many pickles Mr. Wendler needs to buy.

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