用简便方法计算：0.125×0.25×8×47.2÷2.75.4÷0.25+4.6×44.8×9.984÷0.42÷227.8×5.64+71.2×5.64+5.64

Question

用简便方法计算：

0.125×0.25×8×4	7.2÷2.7	5.4÷0.25+4.6×4
4.8×9.9	84÷0.42÷2	27.8×5.64+71.2×5.64+5.64

Answer 1

（1）0.125×0.25×8×4 
=（0.125×8）×（0.25×4 ）
=1×1
=1

（2）7.2÷2.7
=7.2÷（0.9×3）
=7.2÷0.9÷3
=8÷3
=2(2)/(3)

（3）5.4÷0.25+4.6×4
=5.4÷(1)/(4)+4.6×4
=5.4×4+4.6×4
=（5.4+4.6）×4
=10×4
=40

（4）4.8×9.9
=4.8×（10-0.1）
=4.8×10-4.8×0.1
=48-0.48
=47.52

（5）84÷0.42÷2 
=84÷（0.42×2）
=84÷0.84
=100

（6）27.8×5.64+71.2×5.64+5.64
=（27.8+71.2+1）×5.64
=100×5.64
=564