31 & # 10008; 3.14 + 27 & # 10008; 3.14 + 42 & # 10008; 3.14
(31+27+42)×3.14=314
Calculation: 3.68 × 15.7-31.4 + 15.7 × 0.32=______ .
3.68 × 15.7-31.4 + 15.7 × 0.32 = 15.7 × (3.68 + 0.32) - 31.4 = 15.7 × 4-31.4 = 31.4 × 2-31.4 = 31.4, so the answer is 31.4
31 × 3.14 + 27 × 3.14 + 4.2 × 31.4,
The value of 42.7 & # 178; + 14.6 × 42.7 + 7.3 & # 178; is calculated by factorization
42.7²+14.6×42.7+7.3²
=42.7²+2×7.3×42.7+7.3²
=(42.7+7.3)²
=50²
=2500