78×43﹢86÷2×22 简便计算请用符号写清楚
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/20 12:25:47
![78×43﹢86÷2×22 简便计算请用符号写清楚](/uploads/image/z/1256153-41-3.jpg?t=78%C3%9743%EF%B9%A286%C3%B72%C3%9722+%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E8%AF%B7%E7%94%A8%E7%AC%A6%E5%8F%B7%E5%86%99%E6%B8%85%E6%A5%9A)
xQMN@,!r`o^M&.b\qTP]y
,dTޜ31ëc^fo! ΅[wEbAOOUt7/Or2Yq\x,NfUiZ&mԆ8P3[ZGqzV|" bBo
L7zY .㲾v#ȝNE"]C
2'EW:2J`Ep/'4
78×43﹢86÷2×22 简便计算请用符号写清楚
78×43﹢86÷2×22 简便计算
请用符号写清楚
78×43﹢86÷2×22 简便计算请用符号写清楚
78×43﹢86÷2×22
=78×43﹢43×22(乘法分配律)
=43×(78+22)
=4300
字母表达:(a+b)×c=a×c+b×c
数字表达:a×c+b×c
变式:(a-b)c=ac-bc
原式=78×43﹢43×22
=43×﹙78+22﹚
=43×100
=4300
78×43﹢86÷2×22
=78×43﹢43×22
=43×(78+22)
=4300
78 × 43 + 86 ÷ 2 × 22
= 78 × 43 + 43 × 2 ÷ 2 × 22
= 43 × (78 + 22)
= 43 × 100
= 4300