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dusjxjxxb2964
07.10.2020 •
Mathematics
URGENT: I need to solve this problem: 4 - (-6), but that's not all, I'm not really good at math and I need step by step answers as well. Could somebody answer. If you want there are these too: Please include answers and steps -2.5 + 6.1 -10.3 - (-7.79) -4 + 6 1/2 8 5/6 + (-2 1/4) Thank you
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Ответ:
10
3.59
6 7/12
Step-by-step explanation:
4 - (-6)
= 4+ 6 ( because when we multiply the negative sign with the negative sign we get a positive sign or a plus sign)
= 10
-2.5 + 6.1 -10.3 - (-7.79) -4 + 6 1/2
= -2.5 + 6.1 -10.3 +7.79 -4 + 6.5 [ (-*-=+) ( converting 6 1/2 into decimal = 6.5)]
= 6.1+7.79+ 6.5 -2.5 -10.3-4 { adding the + numbers and - numbers separately}
= 20.39 - 16.8 { subtracting the totals of + and - numbers}
= 3.59
8 5/6 + (-2 1/4)
= 53/6 - 9/4 { Converting into improper fractions}
= 53( 2) - 9(3)/12 { Taking LCM = 12}
= 106-27/12
= 79/12
= 6 7/12
{ Converting into improper fractions and vice versa}
we multiply the denominator with the whole number and add it to the numerator to get the improper fraction.( 8 5/6= 53/6)we divide the numerator with the denominator the answer gives the whole number and the remainder gives the numerator of the proper fraction. ( 79/12 = 6 7/12){ Taking LCM = 12}
Factors of 6 are 3 and 2
Factors of 4 are 2 and 2
Least Common Multiple is taking the common factors and multiplying it with the rest . 2 is common in both . It will be taken once and then multiplied with the other 2 and 3 so we get
LCM = 2*2*3= 12
Ответ: