四年级198人去秋游，每人车票和门票共21元，估计要带多少钱？
直接写出得数．27+58= 910﹣540= 7.8÷10= 78﹣0.98= =7﹣= = =
直接写出得数．578+216= 18.25﹣3.3= 3.2﹣=×8.1= += ÷3=0.99×9+0.99= ×=
口算．530﹣399= 9.6÷0.6= ÷6= 25+75÷25+75=0.5= = = ×9=
直接写出得数：142﹣69= 0.56÷8= 1.2×=5.4+9= 0.6×0.6= 7÷0.8=5.1÷0.01= 1÷175%= 3﹣﹣=×5×7=
直接写出得数3500﹣800= 0.4×0.2= 19﹣0.9=8÷= 204÷12= +=+= 0.9+99×0.9=
=
= 
= 
=
=
×8.1= 
= 
÷3=
=
÷6= 25+75÷25+75=
= 
= 
= 
×9=
=
÷0.8=
÷175%= 3
﹣
=
×5×7=
= 204÷12= 
+
=
+
= 0.9+99×0.9=
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