口算
1
﹣
+0.8= 7.4﹣（1
+
）= 1
﹣
﹣
= 1.25×7×8= 12
÷3=
0.25×0.4= 4.4﹣3= 4÷0.25= 3÷10%= 11
×6=
+1÷2
= 
×（1﹣
）= 2×0.75= 
÷
= 5÷25÷0.4=
0.8×
×5= ÷×
= （0.18+
）÷9= 
×
÷
×
= ×÷
=
相关试题
= 
= 
= 
=
= 
= 
= 
=直接写得数．
500÷5= 2.3+3.4= 9﹣3.5= 89×31≈
80×50= 5.3﹣3.5= 15×20= 587÷3≈
1﹣
= 8+4.7= 125×6= 
=
直接写得数．
81÷9= 730×0= 300+99= 33÷8=
8×60= 400×5= 511+189= 200﹣178=
+
= 1﹣
= 
﹣
= 
+
=
62×6≈ 38×9≈ 287×7≈ 302×5≈
﹣
= 28÷5= 
+
=
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