想好先算什么，再仔细算一算．735÷15×7 （704+258）÷37 98+6×58．
计算 75××13×××÷××÷×÷÷÷÷÷21．
×=÷6=÷= 1÷=×=﹣=+= 6÷= 0÷=×===
直接写出得数． 18×=÷= 0.25×3.2×4= 32×（1﹣0.99）= 25%×4= 0÷=÷=×÷×=
直接写得数 72×= 1.25×8= 2.9+6.1=+=÷=×= 25÷75=÷= 1.2×= 5÷=
直接写出得数． ①×4= ②0.5+1= ③3×= ④2﹣0.7= ⑤2÷0.7= ⑥3.5﹣﹣2= ⑦6×（+）= ⑧5.5×4+5.5×6= ⑨4﹣（+1）= ⑩4÷4=
×13
×
×
×
÷
×
×
÷
×
÷
÷
÷
÷
÷21．
×
=
÷6=
÷
= 1÷
×
=
﹣
=
+
= 6÷
=
=
=
=
=
=
÷
= 0.25×3.2×4= 32×（1﹣0.99）=
÷
×
÷
= 1.25×8= 2.9+6.1=
+
=
÷
=
×
= 25÷75=
÷
=
= 5÷
=
×4= ②0.5+1
×
= ④2
= ⑦6×（
+
﹣（
）= ⑩4
÷4=
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