4 years ago

What is expression that uses partial products to multiply 8x64 in 5th grade math

2 answers:

7 0

8 x 64 = (8 x 60) + (8 x 4)= This uses the distributive law which is taught in 5th grade in school systems where I teach.

Pachacha [2.7K]4 years ago

6 0

Answer:

8 x 64 = (8 x 60) + (8 x 4)=

Step-by-step explanation:

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In preparing a certain ointment, a pharmacist used 28.35 g of zinc oxide instead of the 31.1 g called for. Calculate the percent

Vilka [71]

Answer: 9.70%

Step-by-step explanation:

The formula to find the percentage error is given by :-

$\%\text{ error}=\dfrac{|\text{Estimate-Actual}|}{\text{Actual}}\times100$

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g

Estimated mass of zinc oxide used by pharmacist =31.1 g

Now, $\%\text{ error}=\dfrac{|31.1-28.35|}{28.35}\times100$

i.e. $\%\text{ error}=\dfrac{2.75}{28.35}\times100$

i.e. $\%\text{ error}=9.70017636684\approx9.70\%$

Hence, the percentage of error on the basis of the desired quantity.= 9.70%

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4 years ago

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ArbitrLikvidat [17]

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Step-by-step explanation:

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3 years ago

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