直接写出得数．37+63= 168﹣99= 1÷= 48×25%=+= ﹣= 2.4×50= 5.64+3.6=×= 4.83÷0.7≈ 302×8.89≈ 798×21≈
= ．
6﹣5= ．
3+7= ．
5= ．
= 48×25%=
+
= 
﹣
= 2.4×50= 5.64+3.6=
×
= 4.83÷0.7≈ 302×8.89≈ 798×21≈= 48×25%=+= ﹣= 2.4×50= 5.64+3.6=×= 4.83÷0.7≈ 302×8.89≈ 798×21≈
= ．
= ．
+7
= ．
= ．
= ．
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