简算（1）12.96﹣7.31﹣2.69（2）59.6×3+6.625×59（3）12.5×2.5×4×0.8（4）（++）×24．
93.6÷[(54.8+45.2)×0.06]
0.8+0.55+1.2-0.45
+-
1--
口算。+=-=+=-+= 0.63×1000= 0. 75-0.25= 0.07+0.03= 0. 9÷0.03= 0.4×0.8=
+6.625×59
+
）×24．
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