699+736+101+364．
看谁算得快．= 1﹣= = == 1﹣= = =1﹣= = = 1﹣=
怎样算简便就怎样算．①= ②= ③= ④= ．
直接写出得数．+= ﹣= ﹣= 1﹣=﹣= +=
计算下列各题，能简算的要简算．．
直接写得数．+= 43×200= 1﹣= 350+50=630÷7= 15×6÷9= += 45﹣9×5=
= 1﹣
= 
= 
=
= 1﹣
= 
= 
=
= 
= 
= 1﹣
=
= 
= 
= 
= ．
+
= 
﹣
= 
﹣
= 1﹣
=
﹣
= 
+
=
．
+
= 43×200= 1﹣
= 350+50=
+
= 45﹣9×5=
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