99x34的简便计算怎么写
99X34的简算 -
99×34 =(100-1)×34 =34×100-34 =3400-34 =3356
=(100-1)×34 =3400-34 =3366
99×34 =(100-1)×34 =34×100-34 =3400-34 =3356
=(100-1)×34 =3400-34 =3366
=(100-1)X34 =1O0x34-1x34 =3400-34 =3366
那就(100-1)×34=100×34-1×34=3400-34=3366,这样应该就可以了吧,
用脱式计算(尽量用简便方法计算) 99X34? -
99X34简便方法=(100-1)X34 =3400-34=3366
1.第一题不能用简便2.78x101-78 =78x(101-1)=78x100 =7800 3. 99x34 34 =(99 1)x34 =100x34 =3400 这么简单的题目还不能简便,
34x199简便计算怎么做朋友 -
34x199 =34x(200-1)=34x200-34x1 =6800-34 =6766
99x34+99x34-99 提取共项99,简便算=99×(34+34—1)99×67=(100—1)×67 99变成100—1方便计算=100×67—67×1=6700—67=6633
99x34十44x25简便计算? -
99x34+44x25 =(100-1)x34+11x4x25 =3400-34+11x100 =3400+1100-34 =4500-34=4466
用乘法分配律原式=34×(199-99)=34×100 =3400