来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/13 07:51:17
脱式计算,能简算的要简算 (53.76-17.6)÷1.8 (0.8×7+4.56÷1.9)×12.5
15.73-(2.17+0.73)-1.83
(53.76-17.6)÷1.8
=36.16÷1.8
=20又4/45
(0.8×7+4.56÷1.9)×12.5
=0.8*12.5*7+2.4*12.5
=0.8*12.5*7+0.8*12.5*3
=10*(7+3)
=100
15.73-(2.17+0.73)-1.83
=15.73-0.73-(2.17+1.83)
=15-4
=11