直接写出得数。4500÷500= 840÷40= 93×200= 1400÷20= 180÷20= 350÷70=85÷17= 950÷19=144÷12= 63÷21= 780÷13= 630÷21=
2.5÷[(17.2-4.5×3.6)÷0.04] 4.5÷0.25-0.75×1.2
(66-32×1.2)÷0.25 12.5×(1618-8.4÷0.12)
(7.2-3.15)÷0.6×1.3 96.5×43.5+43.5×28.5-25×43.5
8.1×1.3-8×1.3+1.9×1.3+11.9÷1.36 [(7.6-5.2)÷0.4+2.54]×32
2.9×1.4+2×1.6 (2.44-1.8)÷0.4×20