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2019-04-24 09:29:42 Դй

2019ƸԹϢ4

Ƹв⼼ƸϢṩƸв⸴ϰϴȫ,в⿼ʲôݡв⼼ɡв⸴ϰϵȣйҵƸģʱ+в()𰸡ƸӭƸϢ

 

36.𰸡C 8 㵽 17 05 ־ 9×60+5=545 ӣ545÷30=18……5;545÷40=13……25;545÷50=10……45 123 ·ֱҪ 30-5=2540-25=1550-45=5 ӲŻῪ˿ȵȵ 3 ·

37.𰸡B⡣֪ÿѡֶҪѡָһΪһбΪijõλμӵΪ xˣУ x=16 ȷΪ B

38.𰸡CԷۡһһ 50 Ԫʱ 20 Ԫ 012 ţ 3 ;ڶ 50 Ԫ 20 Ԫ 01234 ţ 5 ֡ˣ 5+3=8 ֣ѡ C

39.𰸡Bݳԭ֪칲 150+90-20=220 λˣѡ B

40.𰸡B⼴ 3 ֮Ϊ 20283520=4×528=4×735=5×7ֱ֪ 457ݣ֪ɫľΪ 7 ףѡ B

 

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