2024-11-4 12:54| 查看: 57
练习十四
1 .8 + 8 = 1 6 8 × 2 = 1 6 或 2 × 8 = 1 6 1 6 ÷ 2 = 81 6 ÷ 8 = 22.7,9,356,18,483 .(1)3×7=21(元)或7×3=21(元)答:一共要用21元(2)9×2=18(元)或2×9=18(元)或9+9=18(元)答:一共要用18元