1.45-0.45x1.5
=1.45-0.45x(1+0.5)
=1.45-0.45-0.45x0.5
=1-0.45x0.5
=0.5x(2-0.45)
=0.5x1.55
=0.775
1/2×2/5+9/10÷9/20 2、 5/9×3/10+2/7÷2/5 3、 1/2+1/4×4/5-1/15 4、 3/4×5/7×4/3-1/2 5、 23-8/9×1/27÷1/27 6、 8×5/6+2/5÷4 7、 1/2+3/4×5/12×4/5 8、 8/9×3/4-3/8÷3/4 9、 5/8÷5/4+3/23÷9/11 50+160÷40 (58+370)÷(64-45) 120-144÷18+35 347+45×2-4160÷52 (58+37)÷(64-9×5) 95÷(64-45) 85+14×(14+208÷26) (284+16)×(512-8208÷18) 120-36×4÷18+35 (58+37)÷(64-9×5) (6.8-6.8×0.55)÷8.5 0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6 6-1.6÷4= 5.38+7.85-5.37= 7.2÷0.8-1.2×5= 6-1.19×3-0.43= 6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9 10.15-10.75×0.4-5.7 5.8×(3.87-0.13)+4.2×3.74 32.52-(6+9.728÷3.2)×2.5 [(7.1-5.6)×0.9-1.15] ÷2.5 5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6 (4)12×6÷7.2-6