口算:79÷100=5.85+6.15=0.8-0.65=250×0.04=5.89-5.8=0.43+0.007=79
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79÷100=0.79

5.85+6.15=12

0.8-0.65=0.15

250×0.04=10

5.89-5.8=0.090.43+0.007=0.43779-0.69=78.314.82×1000=4820

9-0.9=8.15×8=4010000÷500=203.71-1.15=2.56

1-0.04=0.964+5×20=1048.6-2.6=63-1.4=1.6

289-25-75=1896.4+2.8=9.28+1.6=9.625×38×4=3800

0.62-0.25=0.3737+0.14=37.145.26+4.8=10.061.023+1.89=2.913

63-3.07=59.9338+137+63=2388.74-6.59=2.15397-83-197=117

(48+56)÷8=1372×(100+1)=7272