45里面有9个5,算式是45÷9=5.
54÷654÷9 4×48+8 7-77÷7
5×96×7 42÷663÷9 2米29厘米+71厘米
7×8= 9×6= 5×6= 8×5=
49÷7= 32÷4= 72÷9= 64÷8=