笔算下面各题．带○的要验算．107×35= ○504÷42= 540×18= ○992÷31=
直接写得数4.3+3.57= 6.3÷0.9= 2.4×0.5= 1÷0.2÷0.5=5﹣﹣= 10÷10%= 1÷0.2÷0.5= 7×÷7×=
直接写得数24÷= ﹣= 10+2.52= （﹣0.5）×=×= （+）×12= ×÷×= 0.32×200=
计算下面各题．= = = =+= = = ==
口算：= = = = == = =
看图填空．
（1）红色+绿色=+=（2）黄色+黑色=+=（3）红色﹣黄色=﹣=（4）你还能提出什么数学问题？能解答吗？
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