脱式计算。'?5o7u)n3W,U*E8S(\5k;Y)W
（1）700.2-（213.5-98.3）=5~8K(q1V6R-G:R7Y7B.w'?5o7u)n3W,U*E8S(\5k;Y)W
算式：提示/F*u7O1\)V6v4u6J:e*_(T/~2x'?5o7u)n3W,U*E8S(\5k;Y)W
（2）20-（8+7.28）=.m7g-h)]'?5o7u)n3W,U*E8S(\5k;Y)W
算式：提示4I2X;j'g3v5w9G4i2q'?5o7u)n3W,U*E8S(\5k;Y)W
（3）3.672+1.8-2.967=;h4t(r5Z+d1K9G7F'?5o7u)n3W,U*E8S(\5k;Y)W
算式：提示:X.Y7C.U,j*o'Q*Y'?5o7u)n3W,U*E8S(\5k;Y)W