1.isilah dengan bilangan yang tepat!

Jawab:

Penjelasan dengan langkah-langkah:

a.

(-15 + (-13)) + 23 = -15 + (-13  + 23) = -28 + 23 = -5

b.

40 + (-30 + 56) = (40 + (-30)) + 56 = 10 + 56 = 66

c.

(-27 + 14) + 16 = -27 + (14 + 16) = -27 + 30 = 3

d.

35 + (-15 + 23) =  (35 + (-15)) + 23 = 20 + 23 =  43

e.

20 + (-70 + 49) = (  20 + (-70)) + 49 = -50 + 49 = -1

f.

(45 x (-20)) x 5 = 45 x (-20 x 5) = 45 x (-100) = – 4.500

g.

50 x (-20 x 21) = (50 x (-20)) x 21 = -1000 x 21 = -21.000

h.

(-75) x (-40 x 11) = ((-75) x (-40) x 11 = 3000 x 11 = 33.000

i.

(-20) x (5 x 32) = ((-20) x 5) x 32 = -100 x 32 = – 3.200

j.

(-25) x ((-4) x 17) = ((-25) x (-4)) x 17 = 100 x 17 = 1.700

maaf ini cuma contoh hehehhe