|
| (1)9999×2010+2010 =(9999+1)×2010, =10000×2010, =20100000; (2)36×(
=36×
=8+21, =29; (3)1.6x+6.4x=3.6 8x=3.6 x=0.45 (4)456+123+544+877 =(456+544)+(123+877), =1000+1000, =2000; (5)2.25×4.8+77.5×48% =2.25×4.8+7.75×4.8, =(2.25+7.75)×4.8, =10×4.8, =48. |
关注公众号回复:奥数答案
即可免费获得密码查看答案
