整理与练习(2) 1.10 4 0.5 5 0.2(最后两个空答案不唯一) 2. < < > < 3. 5.74×1.8÷0.2 5.87×0.99+5.87×0.01 = 5.74×1.8×5 = 5.87×(0.99+0.01) = 5.74×(1.8×5) = 5.87×1 = 5.74×9 = 5.87 = 51.66 7.5÷0.125÷0.8 32×12.5×2.5 = 7.5÷(0.125×0.8) = 4×8×12.5×2.5 = 7.5÷0.1 =(4×2.5)×(8×12.5) = 75 = 10×100 = 1000 10.7+22.5÷(13.5 - 9) 1.62÷[(20.4 - 9.6)×0.3] = 10.7+22.5÷4.5 = 1.62÷(10.8×0.3) = 10.7 |