计算(能简便计算的要用简便方法计算)945÷(720-21×33)9.05-11.3×0.6-1.22815÷23+123×7251427÷[89×(12-38)].-数学
题文
计算(能简便计算的要用简便方法计算) 945÷(720-21×33) 9.05-11.3×0.6-1.22
|
答案
(1)945÷(720-21×33), =945÷(720-693), =945÷27, =35; (2)9.05-11.3×0.6-1.22, =9.05-6.78-1.22, =9.05-(6.78+1.22), =9.05-8, =1.05; (3)
=
=(
=1×
=
(4)
=
=
|