bosslady35
bosslady35
08-02-2017
Mathematics
contestada
Show work when multiplying 3.9×5.3
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christinann062
christinann062
08-02-2017
3.9 x 5.3 = 20.67
im not really sure how i would show my work while typing, but if you really need to see it i could insert a picture, let me know.
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apologiabiology
apologiabiology
08-02-2017
I use the expansion distributive thing
remember a(b+c)=ab+ac
3.9=4-0.1
3.9 times 5.3=
(4-0.1) times 5.3=
5.3(4-0.1)=
5.3(4)+5.3(-0.1)=
(5+0.3)4+5.3(-0.1)=
20+1.2-0.52=
20+0.68=
20.68
taht's one way
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