下面计算过程与对结果对吗？请判断．错的请改正．23+7×（12﹣4）=30×8=240改正：25+75÷75+25=100÷100=1改正：
用递等式计算．．
直接写出得数+= 1÷=×=÷9= （﹣0.5）÷=÷=×=÷10=﹣=÷×=
口算：+= 3﹣2= 1÷1= 7×÷7×= 5÷5=×1.2=×1=（+）×20=
直接写得数． 4÷40%=×= 20×5.5=（+）×4=﹣= 2.9+3.4= 0.1÷0.01= 6﹣﹣=÷3= 6×=÷= 1÷﹣÷1=
直接写出得数+=×= 1﹣20%﹣= 4×==+25%= 3﹣==
．
+
= 1÷
=
×
=
÷9=
﹣0.5）÷
=
÷
=
×
=
÷10=
﹣
=
÷
×
=
+
= 3﹣2
= 1
÷1= 7×
÷5=
×1.2=
×1
=（
+
）×20=
×
= 20×5.5=（
+
）×4=
﹣
= 2.9+3.4= 0.1÷0.01= 6﹣
﹣
=
÷3= 6×
=
÷
= 1÷
﹣
÷1=
+
=
×
= 1﹣20%﹣
= 4×
=
=
+25%= 3﹣
=
=
粤公网安备 44130202000953号