Question

1.Hitunglah 2 1\4 + 3 5/6 + 1 2/12
2.Hitunglah 4 4/5 : 2 2/3
3.Diketahui a = - 3/4 , b = 7/15 , dan c = - 2/9, berapa nilai a kali c kurang b ?
4.Hitunglah nilai dari :
a.( 2 2/5 + 4 1/6 ) - ( 5 2/3 - 3 1/4)
b.( 4 3/7 : 2 1/4 ) : ( 3/5 kali 20 )
5.Hitunglah nilai dari : ( 8 2/5 kali 30 ) : (6 1/8 : 4 1/4 )

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Answer 1

1) 2¼ + 3 5/6 + 1 2/12
= 9/4 + 23/6 + 14/12
= 27/12 + 46/12 + 14/12
= 87/12
= 7 4/12
= 7 ¼

2) 4 4/5 ÷ 2 ⅔
= 24/5 ÷ 8/3
= 24/5 × 3/8
= 9/5
= 1 4/5

3) (-¾) × (-2/9) - 7/15
= 1/6 - 7/15
= 5/30 - 14/30
= (-9/30)
= (-3/10)

4a) (2 2/5 + 4 1/6) - (5⅔ - 3¼)
= (12/5 + 25/6) - (17/3 - 13/4)
= (72/30 + 125/30) - (68/12 - 39/12)
= 197/30 - 29/12
= 394/30 - 145/30
= 249/30
= 8 9/30
= 8 3/10
b) (4 3/7 ÷ 2¼) ÷ (3/5 × 20)
= (31/7 ÷ 9/4) ÷ 12
= (31/7 × 4/9) ÷ 12
= 124 / 63 × 1/12
= 124/ 756

5) (8 2/5 × 30) ÷ (6 1/8 ÷ 4¼)
= (42/5 × 30) ÷ ( 49/8 × 4/17)
= 252 ÷ 49/34
= 252/1 × 34/49
= 8568/49
= 174 42/49