Question

1.2×3.6×10.8+2×6×8+ 1 13 × 3 13 × 9 13

1.2×2.4×4.8+2×4×8+ 1 13 × 2 13 × 4 13

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Answer 1

1.2×3.6×10.8+2×6×8+ 1 13 × 3 13 × 9 13

1.2×2.4×4.8+2×4×8+ 1 13 × 2 13 × 4 13

，
=

1.2×1.2×1.2×27+ 1 13 × 1 13 × 1 13 ×27

1.2×1.2×1.2×8+ 1 13 × 1 13 × 1 13 ×8

，
=

(1.2×1.2×1.2+ 1 13 × 1 13 × 1 13 )×27

(1.2×1.2×1.2+ 1 13 × 1 13 × 1 13 )×8

，
=

27

8

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