脱式计算，能简便的就简便
4.2×99+4.2 0.25×32×12.5 21.4﹣1.4×1.5
（40﹣0.8×4）÷0.4 56×10.1 9.8÷2.5÷0.4．
相关试题
脱式计算，能简便的就简便
4.2×99+4.2 0.25×32×12.5 21.4﹣1.4×1.5
（40﹣0.8×4）÷0.4 56×10.1 9.8÷2.5÷0.4．
+
=
×
=
= 7.2×
= 8
=
÷
= 3.4÷0.17=
×
×
=
=
= 0.6÷6=
= 6
=
+
= 44÷
=
÷80%=
×
= 1÷0.5×2=（
﹣
）÷
=
+
=
÷
=
﹣
=
=
+0.8=
=
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