Hitunglah hasil operasi hitung berikut! a.0,75 2/3×0,2 b.0,6 1/2:(2/3-0,25)×0,8
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SOAL
1.) Hasil operasi bilangan berikut:
A. 0,75 x 2/3 x 0,2.
B. 0,6 x 1/2 ÷ (2/3 - 0,25) x 0,8.
CARA JAWABAN
1.)
A
75/100 x 2/3 x 2/10
(75 x 2 x 2)/(100 x 3 x 10)
(75 x 4)/(100 x 30)
300/3.000 = 1/10
B.
0,6 x 1/2 ÷ (2/3 - 0,25) x 0,8.
6/10 x 1/2 ÷ (2/3 - 25/100) x 8/10
6/10 x 1/2 ÷ (2/3 - 1/4) x 8/10
6/10 x 1/2 ÷ 2.275/100 x 8/10.
3/5 x 1/2 ÷ 91/4 x 8/10.
3/10 x 4/91 x 8/10
(3 x 4 x 8)/(10 x 91 x 10)
96/9.100 = 24/2.275
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