心算 60÷3=________1.4-0.8=________300÷6=________140÷2=________46+38=________240÷6=________1800÷9=________4200÷7=________46÷2=________330-70=________125×8=________72÷9=________606÷3=________150÷5=________630÷9=________300-300÷6=________16×20=________4.1+0.8=________50×16=________13×3=________14×20=________0÷11=________20×60=________19×20=________86-68=________30×12=________20×40=________330-70=________80×9=________11×60=________12×20=________18×40=________33×30=________9-4.8=________3.6-1.8=________6.7+2.5=________24÷4=________80-6=________60÷4=________4+28=________?25+75=________0.6+1.5=________15×50=________141÷3=________91÷7=________3×4×5=________137-67=________380×10=________50×50=________26÷2=________6.2+3.9=________783÷6=________804÷2=________7×0=________780-70=________2407+3=________707÷7=________760-250=________8.4-7.5=________147÷7=________．
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20 0.6 50 70 84 40 200 600 23 260 1000 8 202 30 70 250 320 4.9 800 39 280 0 1200 380 18 360 800 260 720 660 240 720 990 4.2 1.8 9.2 6 74 15 32 100 2.1 750 47 13 60 70 3800 2500 13 10.1 130.5 402 0 710 2410 101 510 0.9 21
解析分析：根据整数加减乘除四则运算的法则求解．
解答：60÷3=201.4-0.8=0.6300÷6=50140÷2=7046+38=84240÷6=401800÷9=2004200÷7=60046÷2=23330-70=260125×8=100072÷9=8606÷3=202150÷5=30630÷9=70300-300÷6=25016×20=3204.1+0.8=4.950×16=80013×3=3914×20=2800÷11=020×60=120019×20=38086-68=1830×12=36020×40=800330-70=26080×9=72011×60=66012×20=24018×40=72033×30=9909-4.8=4.23.6-1.8=1.86.7+2.5=9.224÷4=680-6=7460÷4=154+28=32?25+75=1000.6+1.5=2.115×50=750141÷3=4791÷7=133×4×5=60137-67=70380×10=380050×50=250026÷2=136.2+3.9=10.1783÷6=130.5804÷2=4027×0=0780-70=7102407+3=2410707÷7=101760-250=5108.4-7.5=0.9147÷7=21．
点评：本题考查了基本的运算，计算时要细心，做到快速、准确．