7,7,4,4这四个数怎么凑到24?请写出算式.
问题描述:
7,7,4,4这四个数怎么凑到24?请写出算式.
答
1: (4 - 4 ÷ 7) × 7
2: (4 - (4 ÷ 7)) × 7
3: 7 × (4 - 4 ÷ 7)
4: 7 × (4 - (4 ÷ 7))