用简便方法将计算 1. 98-32-28 2.156-19-81 3.217-65-135 4.345-66-34 5.205+87+13 6.398-163-137
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 22:40:19
![用简便方法将计算 1. 98-32-28 2.156-19-81 3.217-65-135 4.345-66-34 5.205+87+13 6.398-163-137](/uploads/image/z/215508-12-8.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E5%B0%86%E8%AE%A1%E7%AE%97+1.+98-32-28+2.156-19-81+3.217-65-135+4.345-66-34+5.205%EF%BC%8B87%EF%BC%8B13+6.398-163-137)
用简便方法将计算 1. 98-32-28 2.156-19-81 3.217-65-135 4.345-66-34 5.205+87+13 6.398-163-137
用简便方法将计算 1. 98-32-28 2.156-19-81 3.217-65-135 4.345-66-34 5.205+87+13 6.398-163-137
用简便方法将计算 1. 98-32-28 2.156-19-81 3.217-65-135 4.345-66-34 5.205+87+13 6.398-163-137
1.98-32-28
=98-(32+28)
=98-60
=38
2.156-19-81
=156-(19+81)
=156-100
=56
3.217-65-135
=217-(65+135)
=217-200
=17
4.345-66-34
=345-(66+34)
=345-100
=245
5.205+87+13
=205+(87+13)
=205+100
=305
6.398-163-137
=398-(136+137)
=398-300
=98