(1)平均每个西瓜多少千克?(2)每千克西瓜多少元?
估算:24560+11260=21410+21210=15610+21000=90410+21060=95230+21245=91210+21260=
估算:705500-50800≈5035433-205000≈305500-108900≈805433+205000≈855500-579900≈533533-205130≈
估算:905500-500900≈403553-205000≈505500-408900≈703543-205050≈803033-205010≈805500-508900≈
估算:117÷2≈ 124÷2≈153÷5≈ 122÷5≈
估算:252÷2≈ 247÷2≈357÷5≈ 334÷2≈