198x55简便运算(
56x106=56x(_0_) 37x99=37x(_O_) 198x55=(_0_) -
198x55 =55x(200-2)55x200-55x2 =11000-110 =10890 供参考。
201×55 =200×55+55 =11000+55 =11055 所以简便运算把201化为200+1
198x55 =55x(200-2)55x200-55x2 =11000-110 =10890 供参考。
201×55 =200×55+55 =11000+55 =11055 所以简便运算把201化为200+1
105X55 =(100+5)X55 =100X55+5X55 =5500+275 =5775
=(187+13)x55 =200x55 =11000
29x5 5简便运算咋写 -
原式=(30-1)x55 =30x(50+5)55 =1500+150-55 =1595
回答:20X(50+5) =20X50+20X5 =1000+100 =1100
42X55的简便运算? -
(40+2)x55 =55x40+2x55 =2200+110 =2310
简便计算的最后结果是5500。55.5X55 555X55-550ⅹ1.1 55.5×55+55.5×55-550×1.1 =55×(55.5+55.5-11)55×100 =5500 乘法分配律:简便计算中最常用的方法是乘法分配律。乘法分配律指的是ax(b+c)=axb+axc其中a,b,c是任意实数。相反的,axb+axc=ax(b+c)叫做乘法分配律的逆希望你能满意。
190-45x55简便运算? -
190-45x55 =190-(50-5)×(50+5)190-(50²-5²)190-50²+5²=190-2500+25 =-2285
5. 6÷ 3/8 – 3/8 ÷6 6. 4/7 × 5/9 + 3/7 × 5/9 7. 5/2 -(3/2 + 4/5 )8. 7/8 + (1/8 + 1/9 )9. 9 × 5/6 + 5/6 10. 3/4 × 8/9 - 1/3 11. 7 × 5/49 + 3/14 12. 6 ×(1/2 + 2/3 )13. 8 × 4/5 + 8 × 11/到此结束了?。