问题 解答题
用简便方法计算下面各题.
8709-1473-295-527-391-105-409756+478+2346+(356+178)-146
625×36×40×12533333×33334.
答案

(1)8709-1473-295-527-391-105-409,

=8709-(1473+295+527+391+105+409),

=8709-[(1473+527)+(295+105)+(391+409)],

=8709-[2000+400+800],

=8709-3200,

=5509;

(2)756+478+2346+(356+178)-146,

=750+6+450+28+2346+350+6+150+28-146,

=(750+350)+(450+150)+(2346-146)+(6+6+28)+28,

=1100+600+2200+40+28,

=3900+40+68,

=3968;

(3)625×36×40×125,

=625×18×2×40×125,

=(625×18)×(2×40×125),

=11250×10000,

=112500000;

(4)33333×33334=1111122222.

单项选择题
单项选择题