漫游猫认证
5+5=10
r 5 and/plus 5 is/makes/equals 10
r 15–7=8
r 15 minus 7 is/equals 8
r 3×5=15
r 3 times 5 is/makes/equals 15
r 20÷5=4
r 20 divided by 5 is/makes/equals 4
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