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速算与巧算0.8888x10.4-0.1111x3.2(36963-369.63)除以(24642-246.42)(1+1.8)+(2+1.8x2)+(3+1.8x3)+.+(100+1.8x100)(2.17+5.49+3.81)x(5.49+2.17+9.2)-(3.81+2.17+5.49+9.2)X(2.17+5.49)用简便方法

题目详情
速算与巧算
0.8888x10.4-0.1111x3.2
(36963-369.63)除以(24642-246.42)
(1+1.8)+(2+1.8x2)+(3+1.8x3)+.+(100+1.8x100)
(2.17+5.49+3.81)x(5.49+2.17+9.2)-(3.81+2.17+5.49+9.2)X(2.17+5.49)
用简便方法
▼优质解答
答案和解析
(1) 0.8888*10.4-0.1111*8*0.4
=0.8888*(10.4-0.4)
=0.8888*10
=8.888