题目内容

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=________.

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
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=70
46+38=84240÷6=401800÷9=2004200÷7=600
46÷2=23330-70=260125×8=100072÷9=8
606÷3=202150÷5=30630÷9=70300-300÷6=250
16×20=3204.1+0.8=4.950×16=80013×3=39
14×20=2800÷11=020×60=120019×20=380
86-68=1830×12=36020×40=800330-70=260
80×9=72011×60=66012×20=24018×40=720
33×30=9909-4.8=4.23.6-1.8=1.86.7+2.5=9.2
24÷4=680-6=7460÷4=154+28=32
25+75=1000.6+1.5=2.115×50=750141÷3=47
91÷7=133×4×5=60137-67=70380×10=3800
50×50=250026÷2=136.2+3.9=10.1783÷6=130.5
804÷2=4027×0=0780-70=7102407+3=2410
707÷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.
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