0.86×1.2=1.0322.34×0.15≈0.358.16÷1.7=4.81.55÷3.8≈0.4
0.86 × 1.2一一一一一一一 1 7 2 8 6一一一一一一一 1 .0 3 2
0.86×1.2=1.032
0.86 ×1.2=1.023