□里能填几?(1)商是一位数:□08÷32□里能填______.7□3÷75□里能填______.□32÷64□里能填______.(2)商是两位数:□21÷62□里能填______.3□9÷34□里能填______.6□4÷58□里能填______.
(1)因为:20<32,10<32, 所以:□08÷32商是一位数,□里能填2,1; 因为:74<75,73<75,72<75,71<75,70<75 所以:7□3÷75商是一位数,□里能填4,3,2,1,0; 因为:63<64,53<64.43<64,33<64,23<64,13<64 所以:□32÷64商是一位数,□里能填6,5,4,3,2,1. (2)因为:62=62,72>62,82>62,92>62 所以:□21÷62商是两位数,□里能填6,7,8,9. 因为:34=34,35>34,36>34,37>34,38>34,39>34 所以:3□9÷34商是两位数,□里能填4,5,6,7,8,9. 因为:60>58,61>58,62>58,63>58,64>58,65>58,66>58,67>58,68>58,69>58, 所以:6□4÷58商是两位数,□里能填0,1,2,3,4,5,6,7,8,9. 故答案为:2,1,4,3,2,1,0,6,5,4,3,2,1,6,7,8,9,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9. |