Matematika Diketahui a = 3/4 + 1/5 dan b = 1/2 + 2/5 hitunglah dari: A + B,B A - B,C A×B,D B:AMohon jwabannya kakakk dan jangan ngasal TRIMAKASIH​

shyannelangulv – June 09, 2023

Diketahui a = 3/4 + 1/5 dan b = 1/2 + 2/5 hitunglah dari: A + B,B A - B,C A×B,D B:A
Mohon jwabannya kakakk dan jangan ngasal TRIMAKASIH​

Jawab:

a + b = 7/5 = 1 2/5

a-b = 1/2

a×b = 171/400

b : a = 9/19

Penjelasan dengan langkah-langkah:

a = 3/4 + 1/5 = 15/20 + 4/20 = 19/20

b = 1/2 + 2/5 = 5/10 + 4/10 = 9/20

a + b = 19/20 + 9/20 = 28/20 = 14/10 = 7/5 = 1 2/5

a-b = 19/20 - 9/20 = 10/20 = 1/2

a×b = 19/20 + 9/20 = 171/400

b : a = 9/20 : 19/20 = 9/20 × 20/19 = 9/19

Penjelasan dengan langkah-langkah:

A + B

= ( ¾ + ⅕ ) + ( ½ + ⅖ )

= ( (15+4)/20 ) + ( (5+4)/10 )

= 19/20 + 9/10

= (19+18)/20

= 37/20

A - B

= ( ¾ + ⅕ ) - ( ½ + ⅖ )

= ( (15+4)/20 ) - ( (5+4)/10 )

= 19/20 - 9/10

= (19-18)/20

= 1/20

A × B

= ( ¾ + ⅕ ) × ( ½ + ⅖ )

= ( (15+4)/20 ) × ( (5+4)/10 )

= 19/20 × 9/10

= 171/200

A : B

= ( ¾ + ⅕ ) : ( ½ + ⅖ )

= ( (15+4)/20 ) : ( (5+4)/10 )

= 19/20 : 9/10

= 19/20 × 10/9

= 190/180

= 19/18

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