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jeka94
3 years ago
7

Use mental math to evaluate the expression 6(31)+6(4)-6(15)

Mathematics
2 answers:
Nana76 [90]3 years ago
7 0
Okay this is how i did it, 

6(31) + 6(4)  -  6(15)
 186  +  24   -  90
        = 120
Finger [1]3 years ago
3 0
Remember distributive property
a(b+c)=ab+ac
we can ervers it

6(31)+6(4)-6(15)=6(31)+6(4)+6(-15)=6(31+4-15)=6(20)=120
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<u>Given</u> -

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<u>To find</u> -

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<u>Solution</u> -

Area of square = side × side = (60 × 60)m² =

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Hence,

Area of rectangular field = Area of square field = 3600m²

Area of rectangular field = l × b = 3600m²

=> l × 32m = 3600m²

=> l = \sf{\frac{3600}{32}\:m}

=> l = 112.5m

so, the length = 112.5m

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