用简便方法计算．
7.85+6.76+2.15 18.43﹣3.76﹣7.24 21.65+（4.8﹣3.65）
9.64﹣（4.64﹣1.23） 2.7+17.6+3.3﹣5.6 9.87﹣3.5+2.13﹣8.5．
相关试题
用简便方法计算．
7.85+6.76+2.15 18.43﹣3.76﹣7.24 21.65+（4.8﹣3.65）
9.64﹣（4.64﹣1.23） 2.7+17.6+3.3﹣5.6 9.87﹣3.5+2.13﹣8.5．
=
= 71.83÷8≈ 5.04×9.85≈
=
=
= 0.53=
=
=
=
=
=
=
= 60×60%= 2×32=
=
×8=
÷2=
×
=
÷
=
÷
×
=
÷10=
+
=
= 16×
= 1﹣7%=
=
÷2= 4×20%=
×4=
+
）×12= 1÷75%= 1%÷10%= 42%﹣0.42=
= 6÷
=
÷
= 1÷
×
=
×18=
×0×
=
×
=
×26=
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