口算.720+200= 9÷3= 46+10= 80-28= 49÷7= 42÷7= 44-9= 48÷6= 55-20= 35-6= 400+320=
口算.720+200=9÷3=46+10=80-28=49÷7=42÷7=44-9=48÷6=55-20=35-6=400+320=33+60=9+46=28÷7=56÷...
口算.720+200= 9÷3= 46+10= 80-28= 49÷7= 42÷7= 44-9= 48÷6= 55-20= 35-6= 400+320= 33+60= 9+46= 28÷7= 56÷7= 820-400= 46+30= 6×8= 35-8= 24÷4= 40÷8= 21÷3= 7×5= 7+63= 2×5= 7×6= 36+4= 9×4= 59-8= 64÷8= 72÷9= 32÷4= 40÷8= 60-40= 3800-2600= 600+300= 5×4= 36-22= 10÷5= 1100-800= 61+13= 36÷4= 83-29= 5×9= 15÷5= 14+85= 5×6= 62-40= 9×3= 18÷2=
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720+200=920, | 9÷3=3, | 46+10=56, | 80-28=52, |
49÷7=7, | 42÷7=6, | 44-9=35, | 48÷6=8, |
55-20=35, | 35-6=29, | 400+320=720, | 33+60=93, |
9+46=55, | 28÷7=4, | 56÷7=8, | 820-400=420, |
46+30=76, | 6×8=48, | 35-8=27, | 24÷4=6, |
40÷8=5, | 21÷3=7, | 7×5=35, | 7+63=70, |
2×5=10, | 7×6=42, | 36+4=40, | 9×4=36, |
59-8=51, | 64÷8=8, | 72÷9=8, | 32÷4=8, |
40÷8=5, | 60-40=20, | 3800-2600=1200, | 600+300=900, |
5×4=20, | 36-22=14, | 10÷5=2, | 1100-800=300, |
61+13=74, | 36÷4=9, | 83-29=54, | 5×9=45, |
15÷5=3, | 14+85=99, | 5×6=30, | 62-40=22. |
9×3=27, | 18÷2=9. |
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