Question

用自己喜欢的方法计算． 63÷0.25÷0.4  ...

用自己喜欢的方法计算． 63÷0.25÷0.4 0.75×7.4-0.75×6.4 1.35+2.04×4.5 2.5×[1.38÷（6.9×5）] 3.6×0.65+0.36×3.5 54÷（3.94+6.86）

Answer 1

①63÷0.25÷0.4
=63÷（0.25×0.4）
=63÷0.1
=630

②0.75×7.4-0.75×6.4 
=0.75×（7.4-6.4）
=0.75×1
=0.75

③1.35+2.04×4.5
=1.35+9.18
=10.53

④橘嫌2.5×[1.38÷（6.9×5）]
=2.5×（1.38÷34.5）租伍举
=2.5×0.04
=0.1

⑤3.6×0.65+0.36×3.5
=3.6×0.65+3.6×0.35
=3.6×（0.65+0.35）
=3.6×1
=3.6

⑥弊碧54÷（3.94+6.86）
=54÷10.8
=5