express the following rational number as decimal
1)3⅝
2)--21/125
3)3-/32
4)--7 11/80
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Answer:
(i) 3 со ст
= 3+ 8 со ст
= 3 + ст 5 х 125
8 × 125
625 1000 =3+
= 3 +0.625
= 3.60
(ii)
-12
125
-12 × 8
125 × 8
-12 × 8
1000
-96
1000
= -0,006
0.09375
3.00000
0
30
0
300
288
120
96
240
224
160
160
0
(iv) -7 11 80
= -(7 + 11 80
= -(7+ 11 × 125 80 × 125
= − (7 + - 1375 10000
= -(7 +0.1375) -
= −(7 +0.1375)
-7.1275
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