脱式计算．（能简算的要简算）（+）×8+ 4.5﹣（+1.5）﹣ （+×）÷ ÷[×（+）]．
直接写出得数．×4= 0.8÷0.01= 0.6÷= 0.37+2.73=+=÷2= 112= 20×5.5=
×80% 1﹣78% 100﹣56%÷40% 60%×70% 8.7×45% 1+1% 25×． 1.2+20%+×90% 8×（1+25%） 80%÷．
口算 15÷0.25= 1.5×=×1.8= 2.5×0.4= 32×2.5= 24×= 2.4+1.6=÷=×=÷25%=
直接写得数． 2.4×50%=+= 5.8﹣0.89= 0.52=÷10= 3.9×1.1=（+）×12= 1﹣+=
3.26+2.4=== 3.6÷0.6= 1﹣0.52= 2.5×3.5×0.4===
+
）×8+
4.5﹣（
+1.5）﹣
（
×
）÷
÷[
×（
+
）]．
×4= 0.8÷0.01= 0.6÷
= 0.37+2.73=
+
=
÷2= 112= 20×5.5=
×80% 1﹣78% 100﹣56%
÷40%
×90% 8×（1+25%） 80%÷
=
×1.8= 2.5×0.4= 32×2.5=
= 2.4+1.6=
÷
=
×
=
÷25%=
+
= 5.8﹣0.89= 0.52=
÷10= 3.9×1.1=（
+
）×12= 1﹣
+
=
=
= 3.6÷0.6=
=
=
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