130×2=260 45÷5=9 48+22=70 27÷6=4…3 25×8=200 56-9=47
49+18=67 47÷7=6…5 400×5=2000 42÷9=4…6 32÷6=5…2 76-28=48
1-
2
5 =
3
5
2
7 +
5
7 =1
6
9 -
4
9 =
2
9
3
8 +
2
8 =
5
8 109×5≈550 798×3≈2400
130×2=260 45÷5=9 48+22=70 27÷6=4…3 25×8=200 56-9=47
49+18=67 47÷7=6…5 400×5=2000 42÷9=4…6 32÷6=5…2 76-28=48
1-
2
5 =
3
5
2
7 +
5
7 =1
6
9 -
4
9 =
2
9
3
8 +
2
8 =
5
8 109×5≈550 798×3≈2400