0.28×21.7= 2.8×0.217=
×2.17=60.76 0.028×=607.6
210500≈万 78987≈万 93564≈万
×=38.5
×=3.85
385÷=0.385
①102×28
②8.3-5.47
③56×【(306+99)÷27】
④132+66×98
⑤4.32+0.68-3.32
⑥12×11×75
⑦956-297
⑧3200÷25÷16
⑨0.98+0.97-0.96+0.95-0.94
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