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1. Jawaban cupid85
5) 6½ - 3¼ - 7/10
= ( 6 - 3 ) + ( ½ - ¼ - 7/10)
= 3 + ( 10/20 - 5/20 - 14/20)
= 3 + ( - 9/20)
= 3 - 9/20
= 2 11/20 kg ( D )
6) a - b + c
= 12½ - 3²/5 + 1 16/24
= 12½ - 3 2/5 + 1 ⅔
= 12 15/30 - 3 12/30 + 1 20/30
= 10 23/30 ( D )
7) 4⅓ × 2/5 × 0,5
= 13/3 × 2/5 × 5/10
= 26/15 × 5/10
= 130/150
= 13/15 ( A )
8) 7 × 5¼
= 7 × 21/4
= 147/4
= 36 ¾ ( B )
9) 2,5 × 0,02
= 25/10 × 2/100
= 50/1000
= 0,050 ( C )
10) 4⅓ ÷ 3/5 ÷ 1,5
= 13/3 × 5/3 ÷ 15/10
= 65/9 × 10/15
= 650/135
= 4 110/135
= 4 22/27 ( D )