Jawaban:

Sifat asosiatif adalah penjumlahan dg cara pengelompokkan

Sidat asosiatif penjumlahan

Rumusnya:

(a + b) + c = a + (b+c)

Sifat asosiatif perkalian

(a × b) × c = a × (b × c)

Sifat distributif (penyebaran)

a × (b+c) = (a×b) + (a×c) = d

a × (b-c) = (a×b) - (a×c) = d

3. lengkapi dg sifat asosiatif

a. (2+3) + 5 = 2 + (3+5)

= 2 + 8

= 10

b. (4+6)+10 = 4 + (6 + 10)

= 4 + 16

= 20

c. (121 + 112) + 122 = 121 + (112 + 122)

= 121 + 234

= 355

d. (44 + 334) + 66 = 44 +(334 + 66)

= 44 + 400

= 444

e. 46 + (219 + 21) = (46 + 219) + 21

= 265 + 21

= 286

4. lengkapi dg sifat asosiatif

a. (21 × 12) × 22 = 21 × (12 × 22)

= 21 × 264

= 5.544

b. (4 × 66) × 5 = 4 × (66 × 5)

= 4 × 330

= 1.320

c. (10 × 2) × 95 = 10 × (2 × 95)

= 10 × 190

= 1.900

d. (15 × 25) × 5 = 15 × (25 × 5)

= 15 × 125

= 1.875

e. 8× (12 × 5) = (8 × 12) × 5

= 96 × 5

= 480

5. lengkapi dg sifat distributif

a. 10 × (3+7) = (10 × 3) + (10×7)

= 30 + 70

= 100

b. 25 × (10 + 5) = (25 × 10) + (25 × 5)

= 250 + 125

= 375

c. 13 × (5 - 2) = (13 × 5) - (13 × 2)

= 65 - 26

= 39

d. 21 × (6 - 3) = (21 × 6) - (21 × 3)

= 126 - 63

= 63

e. 150 × (8 + 2) = (150 × 8) + (150 × 2)

= 1.200 + 300

= 1.500