1.
简算
2.5×9.76×0.4 12.5×8.8 0.72×101
7.8×9.2+7.8×0.8 2.5×1.3×0.4 50×0.27×0.2
13.2×0.67+13.2×0.33 0.125×9.82×80 1.5×102
0.825×7.2+2.8×0.825 0.25×4.3×0.4 8.2×3.24+8.2×6.76 72×1.01
73.6×0.83+1.7×7.36 3.64+4.83+6.36+5.17 0.25×0.125×0.4×0.8 40.6-9.18-10.82 5.65×1.7+5.65×8.3 15.39-0.48-0.52 32.4+8.52+17.6 思考题：
16.5÷3+0.55×90
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