Matematika

Pertanyaan

hitunglah hasil pembagian berikut.
1. 1,8 : 0,2=
2. 5,4 : 0,6
3. 1,2 : 4,8=
4. 7,2 : 0,3=
5. 6/8 : 0,2=
6. 8/25 : 2,5=
7. 2,1 : 5/8=
8. 3 1/2 : 0,75=
9. 5 ℅ : 1 1/4=
10. 15℅ : 1 2/5 =
tolong pakai cara

1 Jawaban

  • 1) 1,8÷0,2=9
    18/10÷2/10 = 9/5x5/1 = 45/5 = 9.

    2) 5,4÷0,6=9
    54/10÷6/10 = 27/5x5/3 = 135/15 = 9.

    3) 1,2÷4,8=0,25
    12/10÷48/10=6/5x5/24=30/120 = 0,25.

    4) 7,2÷0,3=24
    72/10÷3/10 =36/5x10/3=360/15=24.

    5) 6/8÷0,2=3/4÷0,2=0,75÷0,2=3,75
    75/100÷2/10= 3/4x10/2= 30/8= 3,75.

    6) 8/25÷2,5=0,32÷2,5=0,128
    32/100÷25/10= 8/25x2/5 = 16/125 =0,128.

    7) 2,1÷5/8=2,1÷0,625=3,36
    21/10÷625/1000= 21/10x8/5 = 168/50 = 3,36.

    8) 3 1/2÷0,75=7/2÷0,75=3,5÷0,75=4,66666667
    35/10÷75/100=7/2x4/3=28/6=4,66666667.

    9)5%÷1 1/4= 5/100÷5/4=0,05÷1,25=0,04
    5/100÷5/4=1/20x4/5=4/100=0,04.

    10) 15%÷1 2/5= 15/100÷7/5=3/20÷7/5=0,15÷1,4=0,
    107142857
    15/100÷7/5= 3/20x5/7= 15/140=0,107142857.


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