Gunakanlah hukum distributif
a.4 × 2/7 + 4 × 5/7
b.2/5 × 9 + 2/5 × 6
c.7 × 2/9 - 5 × 2/9
a.4 × 2/7 + 4 × 5/7
b.2/5 × 9 + 2/5 × 6
c.7 × 2/9 - 5 × 2/9
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= 4 ( 2/7 + 5/7)
= 4(7/7)
= 4(1)
= 4
b. 2/5 x 9 + 2/5 x 6
= 2/5 ( 9 + 6)
= 2/5 (15)
= 2(3)
= 6
c. 7 x 2/9 - 5 x 2/9
= 2/9 ( 7 - 5)
= 2/9 ( 2)
= 4/9