3.8×1.9+6.2×1.9= 4 55.6×99+55.6= 0x0-2 ② 1.8×99+1.8= 5 1.25×213×0.8= =0 22 0.25×44= 6 19.625-(4.3+9.625)= C00+8.f 23 0.125×64= =0×89.1 7 3.42×5.7+4.3×3.42= 24 4×43×0.25= =i0 8 8.75×11-8.75= 25 8×(1.25+2.1)=00x8.8...