答:乘除脱式计算如下:
40×5x2,81÷9÷9,12x4Ⅹ5
80÷(20x2),12÷2÷3
8Ⅹ(4x5),30÷3x2,49÷7÷7
56÷(7x8),50÷5÷2
48÷(6Ⅹ8),12÷6x9
(7x5)÷5,100x(40÷4)
8÷4x10,63÷9÷7,72÷(8x9)
…
答:乘除脱式计算如下:
40×5x2,81÷9÷9,12x4Ⅹ5
80÷(20x2),12÷2÷3
8Ⅹ(4x5),30÷3x2,49÷7÷7
56÷(7x8),50÷5÷2
48÷(6Ⅹ8),12÷6x9
(7x5)÷5,100x(40÷4)
8÷4x10,63÷9÷7,72÷(8x9)
…