1.3.26×4.5+5.2×3.26+9.7×6.74=3.26x(4.5+5.2)+9.7×6.74=3.26x9.7+9.7×6.74=9.7x10=972.15.8×5.8+4.2×4.2+11.6×4.2=4.2x(4.2+11.6)+15.8×5.8=4.2x15.8+15.8x5.8=15.8x10=158