Matematika

Pertanyaan

1.(-12):(-3)+7x4-(-5)
2. 20+8x(-5)+16:(-8)+10
3. 14x5-27:(-3)-12
4. 15-10x(-5)-12:(-6)+5
5. (-21):(-7)+5x(-8)-(-6)
6. 10+(-12):(-6)-8x6+5
7. 8+15x3-(-6)x3 - 4
8. 5+(-7) x2+18:(-9)+6
9. 12-10x2-(-20):(-4)
10. 15+7x(-3) + 8 - 4 : (-7)


Kak please kerjain semua nya ya dan pake cara ya
makasi banyak:))

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1 Jawaban

  • 1.(-12):(-3)+7x4-(-5) = ((-12):(-3)) + (7 x 4) - (-5)
                                     = 4 + 28 + 5
                                     = 37

    2.     20+8x(-5)+16:(-8)+10 = 20 + (8 x (-5))+(16:(-8)) + 10
                                           = 20 + (-40) + (-2) + 10
                                           = 20 - 40 - 2 + 10
                                           = - 12

    3. 14x5-27:(-3)-12 = (14 x 5) - (27:(-3)) - 12
                                  = 60 - (-9) - 12
                                  = 60 + 9 - 12
                                  = 57

    4. 15-10x(-5)-12:(-6)+5 = 15 - (10 x (-5)) - (12 : (-6)) + 5
                                          = 15 - (-50) - (-2) + 5
                                          = 15 + 50 + 2 + 5
                                          = 72

    5. (-21):(-7)+5x(-8)-(-6) = ((-21) : (-7)) + (5 x (-8)) - (-6)
                                          = 3 + (-40) + 6
                                          = - 31

    6. 10+(-12):(-6)-8x6+5 = 10 + ((-12):(-6)) - (8 x 6) + 5
                                        = 10 + 2 - 48 + 5
                                        = -31

    7. 8+15x3-(-6)x3 - 4 = 8 + (15 x 3) - ((-6) x 3) - 4
                                     = 8 + 45 - (-18) - 4
                                     = 8 + 45 + 18 - 4
                                     = 67

    8. 5+(-7) x2+18:(-9)+6 = 5 + ((-7) x 2) + (18 : (-9)) + 6
                                        = 5 + (-14) + (-2) + 6
                                        = 5 -14 - 2 + 6
                                        = -5

    9. 12-10x2-(-20):(-4) = 12 - (10 x 2) - ((-20):(-4))
                                     = 12 - 20 - 5
                                     = -13

    10. 15+7x(-3) + 8 - 4 : (-7) = 15 + (7 x (-3)) + 8 - (4 : (-7))
                                               = 15 + (-21) + 8 - (-4/7)
                                               = 15 - 21 + 8 + 4/7
                                               = 2 4/7

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