计算：303×4×5 4×（287﹣132）740×4×5 56÷8×87 4×287﹣132 7×125×8．
直接写出得数+= ×= 1﹣20%﹣= 4×== +25%= 3﹣= =
直接写得数．= 4﹣1.63= = == = = == 27×5%= %= =
直接写得数+= ﹣= ×= ×=×÷×= += ×0+3= 3+1.75=÷= （+）×=
直接写得数．+0.625= 24×= ÷9=（+）×12= 12×25%= ÷=
直接写出得数= = 3.14×8= =1﹣40%= = = 52=
+
= 
×
= 1﹣20%﹣
= 4×
=
= 
+25%= 3﹣
= 
=
= 4﹣1.63= 
= 
=
= 
= 
= 
=
= 27×5%= 
%= 
=
+
= 
﹣
= 
×
= 
×
=
×
÷
= 
= 
×0+3= 3
+1.75=
÷
= （
+
）×
=
+0.625= 24×
= 
÷9=
+
）×12= 12×25%= 
÷
=
= 
= 3.14×8= 
=
= 
= 52=
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